Vulnerability Details CVE-2025-53859
NGINX Open Source and NGINX Plus have a vulnerability in the ngx_mail_smtp_module that might allow an unauthenticated attacker to over-read NGINX SMTP authentication process memory; as a result, the server side may leak arbitrary bytes sent in a request to the authentication server. This issue happens during the NGINX SMTP authentication process and requires the attacker to make preparations against the target system to extract the leaked data. The issue affects NGINX only if (1) it is built with the ngx_mail_smtp_module, (2) the smtp_auth directive is configured with method "none," and (3) the authentication server returns the "Auth-Wait" response header.
Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 6.1%
CVSS Severity
CVSS v3 Score 3.7
Products affected by CVE-2025-53859
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cpe:2.3:a:f5:nginx_open_source:0.7.22
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cpe:2.3:a:f5:nginx_open_source:0.7.23
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cpe:2.3:a:f5:nginx_open_source:0.7.24
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cpe:2.3:a:f5:nginx_open_source:0.7.25
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cpe:2.3:a:f5:nginx_open_source:0.7.26
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cpe:2.3:a:f5:nginx_open_source:0.7.27
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cpe:2.3:a:f5:nginx_open_source:0.7.28
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cpe:2.3:a:f5:nginx_open_source:0.7.29
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cpe:2.3:a:f5:nginx_open_source:0.7.30
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cpe:2.3:a:f5:nginx_open_source:0.7.31
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cpe:2.3:a:f5:nginx_open_source:0.7.32
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cpe:2.3:a:f5:nginx_open_source:0.7.33
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cpe:2.3:a:f5:nginx_open_source:0.7.34
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cpe:2.3:a:f5:nginx_open_source:0.7.35
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cpe:2.3:a:f5:nginx_open_source:0.7.36
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cpe:2.3:a:f5:nginx_open_source:0.7.37
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cpe:2.3:a:f5:nginx_open_source:0.7.38
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cpe:2.3:a:f5:nginx_open_source:0.7.39
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cpe:2.3:a:f5:nginx_open_source:0.7.40
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cpe:2.3:a:f5:nginx_open_source:0.7.41
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cpe:2.3:a:f5:nginx_open_source:0.7.42
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cpe:2.3:a:f5:nginx_open_source:0.7.43
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cpe:2.3:a:f5:nginx_open_source:0.7.44
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cpe:2.3:a:f5:nginx_open_source:0.7.45
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cpe:2.3:a:f5:nginx_open_source:0.7.46
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cpe:2.3:a:f5:nginx_open_source:0.7.47
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cpe:2.3:a:f5:nginx_open_source:0.7.48
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cpe:2.3:a:f5:nginx_open_source:0.7.49
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cpe:2.3:a:f5:nginx_open_source:0.7.50
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cpe:2.3:a:f5:nginx_open_source:0.7.51
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cpe:2.3:a:f5:nginx_open_source:0.7.52
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cpe:2.3:a:f5:nginx_open_source:0.7.53
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cpe:2.3:a:f5:nginx_open_source:0.7.54
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cpe:2.3:a:f5:nginx_open_source:0.7.55
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cpe:2.3:a:f5:nginx_open_source:0.7.56
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cpe:2.3:a:f5:nginx_open_source:0.7.57
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cpe:2.3:a:f5:nginx_open_source:0.7.58
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cpe:2.3:a:f5:nginx_open_source:0.7.59
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cpe:2.3:a:f5:nginx_open_source:0.8.0
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cpe:2.3:a:f5:nginx_open_source:0.8.1
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cpe:2.3:a:f5:nginx_open_source:0.8.10
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cpe:2.3:a:f5:nginx_open_source:0.8.11
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cpe:2.3:a:f5:nginx_open_source:0.8.12
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cpe:2.3:a:f5:nginx_open_source:0.8.13
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cpe:2.3:a:f5:nginx_open_source:0.8.14
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cpe:2.3:a:f5:nginx_open_source:0.8.15
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cpe:2.3:a:f5:nginx_open_source:0.8.16
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cpe:2.3:a:f5:nginx_open_source:0.8.17
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cpe:2.3:a:f5:nginx_open_source:0.8.18
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cpe:2.3:a:f5:nginx_open_source:0.8.19
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cpe:2.3:a:f5:nginx_open_source:0.8.2
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cpe:2.3:a:f5:nginx_open_source:0.8.20
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cpe:2.3:a:f5:nginx_open_source:0.8.21
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cpe:2.3:a:f5:nginx_open_source:0.8.22
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cpe:2.3:a:f5:nginx_open_source:0.8.23
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cpe:2.3:a:f5:nginx_open_source:0.8.24
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cpe:2.3:a:f5:nginx_open_source:0.8.25
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cpe:2.3:a:f5:nginx_open_source:0.8.26
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cpe:2.3:a:f5:nginx_open_source:0.8.27
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cpe:2.3:a:f5:nginx_open_source:0.8.28
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cpe:2.3:a:f5:nginx_open_source:0.8.29
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cpe:2.3:a:f5:nginx_open_source:0.8.3
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cpe:2.3:a:f5:nginx_open_source:0.8.30
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cpe:2.3:a:f5:nginx_open_source:0.8.31
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cpe:2.3:a:f5:nginx_open_source:0.8.32
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cpe:2.3:a:f5:nginx_open_source:0.8.33
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cpe:2.3:a:f5:nginx_open_source:0.8.34
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cpe:2.3:a:f5:nginx_open_source:0.8.35
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cpe:2.3:a:f5:nginx_open_source:0.8.36
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cpe:2.3:a:f5:nginx_open_source:0.8.37
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cpe:2.3:a:f5:nginx_open_source:0.8.38
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cpe:2.3:a:f5:nginx_open_source:0.8.39
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cpe:2.3:a:f5:nginx_open_source:0.8.4
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cpe:2.3:a:f5:nginx_open_source:0.8.40
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cpe:2.3:a:f5:nginx_open_source:0.8.41
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cpe:2.3:a:f5:nginx_open_source:0.8.42
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cpe:2.3:a:f5:nginx_open_source:0.8.43
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cpe:2.3:a:f5:nginx_open_source:0.8.44
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cpe:2.3:a:f5:nginx_open_source:0.8.45
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cpe:2.3:a:f5:nginx_open_source:0.8.46
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cpe:2.3:a:f5:nginx_open_source:0.8.47
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cpe:2.3:a:f5:nginx_open_source:0.8.48
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cpe:2.3:a:f5:nginx_open_source:0.8.49
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cpe:2.3:a:f5:nginx_open_source:0.8.5
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cpe:2.3:a:f5:nginx_open_source:0.8.50
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cpe:2.3:a:f5:nginx_open_source:0.8.51
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cpe:2.3:a:f5:nginx_open_source:0.8.52
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cpe:2.3:a:f5:nginx_open_source:0.8.53
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cpe:2.3:a:f5:nginx_open_source:0.8.6
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cpe:2.3:a:f5:nginx_open_source:0.8.7
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cpe:2.3:a:f5:nginx_open_source:0.8.8
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cpe:2.3:a:f5:nginx_open_source:0.8.9
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cpe:2.3:a:f5:nginx_open_source:0.9.0
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cpe:2.3:a:f5:nginx_open_source:0.9.1
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cpe:2.3:a:f5:nginx_open_source:0.9.2
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cpe:2.3:a:f5:nginx_open_source:0.9.3
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cpe:2.3:a:f5:nginx_open_source:0.9.4
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cpe:2.3:a:f5:nginx_open_source:0.9.5
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cpe:2.3:a:f5:nginx_open_source:0.9.6
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cpe:2.3:a:f5:nginx_open_source:0.9.7
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cpe:2.3:a:f5:nginx_open_source:1.0.0
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cpe:2.3:a:f5:nginx_open_source:1.0.1
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cpe:2.3:a:f5:nginx_open_source:1.0.2
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cpe:2.3:a:f5:nginx_open_source:1.0.3
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cpe:2.3:a:f5:nginx_open_source:1.0.4
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cpe:2.3:a:f5:nginx_open_source:1.0.5
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cpe:2.3:a:f5:nginx_open_source:1.1.0
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cpe:2.3:a:f5:nginx_open_source:1.1.1
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cpe:2.3:a:f5:nginx_open_source:1.1.10
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cpe:2.3:a:f5:nginx_open_source:1.1.11
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cpe:2.3:a:f5:nginx_open_source:1.1.12
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cpe:2.3:a:f5:nginx_open_source:1.1.13
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cpe:2.3:a:f5:nginx_open_source:1.1.14
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cpe:2.3:a:f5:nginx_open_source:1.1.15
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cpe:2.3:a:f5:nginx_open_source:1.1.16
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cpe:2.3:a:f5:nginx_open_source:1.1.17
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cpe:2.3:a:f5:nginx_open_source:1.1.18
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cpe:2.3:a:f5:nginx_open_source:1.1.19
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cpe:2.3:a:f5:nginx_open_source:1.1.2
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cpe:2.3:a:f5:nginx_open_source:1.1.3
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cpe:2.3:a:f5:nginx_open_source:1.1.4
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cpe:2.3:a:f5:nginx_open_source:1.1.5
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cpe:2.3:a:f5:nginx_open_source:1.1.6
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cpe:2.3:a:f5:nginx_open_source:1.1.7
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cpe:2.3:a:f5:nginx_open_source:1.1.8
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cpe:2.3:a:f5:nginx_open_source:1.1.9
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cpe:2.3:a:f5:nginx_open_source:1.11.0
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cpe:2.3:a:f5:nginx_open_source:1.11.1
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cpe:2.3:a:f5:nginx_open_source:1.11.10
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cpe:2.3:a:f5:nginx_open_source:1.11.11
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cpe:2.3:a:f5:nginx_open_source:1.11.12
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cpe:2.3:a:f5:nginx_open_source:1.11.13
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cpe:2.3:a:f5:nginx_open_source:1.11.2
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cpe:2.3:a:f5:nginx_open_source:1.11.3
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cpe:2.3:a:f5:nginx_open_source:1.11.4
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cpe:2.3:a:f5:nginx_open_source:1.11.5
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cpe:2.3:a:f5:nginx_open_source:1.11.6
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cpe:2.3:a:f5:nginx_open_source:1.11.7
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cpe:2.3:a:f5:nginx_open_source:1.11.8
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cpe:2.3:a:f5:nginx_open_source:1.11.9
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cpe:2.3:a:f5:nginx_open_source:1.13.0
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cpe:2.3:a:f5:nginx_open_source:1.13.1
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cpe:2.3:a:f5:nginx_open_source:1.13.10
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cpe:2.3:a:f5:nginx_open_source:1.13.11
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cpe:2.3:a:f5:nginx_open_source:1.13.12
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cpe:2.3:a:f5:nginx_open_source:1.13.2
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cpe:2.3:a:f5:nginx_open_source:1.13.3
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cpe:2.3:a:f5:nginx_open_source:1.13.4
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cpe:2.3:a:f5:nginx_open_source:1.13.5
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cpe:2.3:a:f5:nginx_open_source:1.13.6
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cpe:2.3:a:f5:nginx_open_source:1.13.7
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cpe:2.3:a:f5:nginx_open_source:1.13.8
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cpe:2.3:a:f5:nginx_open_source:1.13.9
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cpe:2.3:a:f5:nginx_open_source:1.15.0
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cpe:2.3:a:f5:nginx_open_source:1.15.1
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cpe:2.3:a:f5:nginx_open_source:1.15.10
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cpe:2.3:a:f5:nginx_open_source:1.15.11
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cpe:2.3:a:f5:nginx_open_source:1.15.12
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cpe:2.3:a:f5:nginx_open_source:1.15.2
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cpe:2.3:a:f5:nginx_open_source:1.15.3
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cpe:2.3:a:f5:nginx_open_source:1.15.4
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cpe:2.3:a:f5:nginx_open_source:1.15.5
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cpe:2.3:a:f5:nginx_open_source:1.15.6
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cpe:2.3:a:f5:nginx_open_source:1.15.7
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cpe:2.3:a:f5:nginx_open_source:1.15.8
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cpe:2.3:a:f5:nginx_open_source:1.15.9
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cpe:2.3:a:f5:nginx_open_source:1.17.0
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cpe:2.3:a:f5:nginx_open_source:1.17.1
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cpe:2.3:a:f5:nginx_open_source:1.17.10
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cpe:2.3:a:f5:nginx_open_source:1.17.2
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cpe:2.3:a:f5:nginx_open_source:1.17.3
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cpe:2.3:a:f5:nginx_open_source:1.17.4
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cpe:2.3:a:f5:nginx_open_source:1.17.5
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cpe:2.3:a:f5:nginx_open_source:1.17.6
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cpe:2.3:a:f5:nginx_open_source:1.17.7
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cpe:2.3:a:f5:nginx_open_source:1.17.8
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cpe:2.3:a:f5:nginx_open_source:1.17.9
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cpe:2.3:a:f5:nginx_open_source:1.19.0
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cpe:2.3:a:f5:nginx_open_source:1.19.1
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cpe:2.3:a:f5:nginx_open_source:1.19.10
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cpe:2.3:a:f5:nginx_open_source:1.19.2
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cpe:2.3:a:f5:nginx_open_source:1.19.3
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cpe:2.3:a:f5:nginx_open_source:1.19.4
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cpe:2.3:a:f5:nginx_open_source:1.19.5
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cpe:2.3:a:f5:nginx_open_source:1.19.6
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cpe:2.3:a:f5:nginx_open_source:1.19.7
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cpe:2.3:a:f5:nginx_open_source:1.19.8
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cpe:2.3:a:f5:nginx_open_source:1.19.9
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cpe:2.3:a:f5:nginx_open_source:1.2.0
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cpe:2.3:a:f5:nginx_open_source:1.21.0
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cpe:2.3:a:f5:nginx_open_source:1.21.1
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cpe:2.3:a:f5:nginx_open_source:1.21.2
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cpe:2.3:a:f5:nginx_open_source:1.21.3
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cpe:2.3:a:f5:nginx_open_source:1.21.4
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cpe:2.3:a:f5:nginx_open_source:1.21.5
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cpe:2.3:a:f5:nginx_open_source:1.21.6
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cpe:2.3:a:f5:nginx_open_source:1.23.0
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cpe:2.3:a:f5:nginx_open_source:1.23.1
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cpe:2.3:a:f5:nginx_open_source:1.23.2
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cpe:2.3:a:f5:nginx_open_source:1.23.3
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cpe:2.3:a:f5:nginx_open_source:1.23.4
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cpe:2.3:a:f5:nginx_open_source:1.25.0
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cpe:2.3:a:f5:nginx_open_source:1.25.1
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cpe:2.3:a:f5:nginx_open_source:1.25.2
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cpe:2.3:a:f5:nginx_open_source:1.25.3
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cpe:2.3:a:f5:nginx_open_source:1.25.4
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cpe:2.3:a:f5:nginx_open_source:1.25.5
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cpe:2.3:a:f5:nginx_open_source:1.26.1
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cpe:2.3:a:f5:nginx_open_source:1.26.2
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cpe:2.3:a:f5:nginx_open_source:1.27.0
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cpe:2.3:a:f5:nginx_open_source:1.27.1
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cpe:2.3:a:f5:nginx_open_source:1.27.2
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cpe:2.3:a:f5:nginx_open_source:1.27.3
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cpe:2.3:a:f5:nginx_open_source:1.27.4
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cpe:2.3:a:f5:nginx_open_source:1.27.5
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cpe:2.3:a:f5:nginx_open_source:1.28.2
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cpe:2.3:a:f5:nginx_open_source:1.28.3
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cpe:2.3:a:f5:nginx_open_source:1.29.0
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cpe:2.3:a:f5:nginx_open_source:1.3.0
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cpe:2.3:a:f5:nginx_open_source:1.3.1
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cpe:2.3:a:f5:nginx_open_source:1.3.10
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cpe:2.3:a:f5:nginx_open_source:1.3.11
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cpe:2.3:a:f5:nginx_open_source:1.3.12
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cpe:2.3:a:f5:nginx_open_source:1.3.13
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cpe:2.3:a:f5:nginx_open_source:1.3.14
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cpe:2.3:a:f5:nginx_open_source:1.3.15
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cpe:2.3:a:f5:nginx_open_source:1.3.16
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cpe:2.3:a:f5:nginx_open_source:1.3.2
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cpe:2.3:a:f5:nginx_open_source:1.3.3
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cpe:2.3:a:f5:nginx_open_source:1.3.4
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cpe:2.3:a:f5:nginx_open_source:1.3.5
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cpe:2.3:a:f5:nginx_open_source:1.3.6
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cpe:2.3:a:f5:nginx_open_source:1.3.7
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cpe:2.3:a:f5:nginx_open_source:1.3.8
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cpe:2.3:a:f5:nginx_open_source:1.3.9
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cpe:2.3:a:f5:nginx_open_source:1.4.0
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cpe:2.3:a:f5:nginx_open_source:1.5.0
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cpe:2.3:a:f5:nginx_open_source:1.5.1
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cpe:2.3:a:f5:nginx_open_source:1.5.10
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cpe:2.3:a:f5:nginx_open_source:1.5.11
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cpe:2.3:a:f5:nginx_open_source:1.5.12
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cpe:2.3:a:f5:nginx_open_source:1.5.13
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cpe:2.3:a:f5:nginx_open_source:1.5.2
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cpe:2.3:a:f5:nginx_open_source:1.5.3
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cpe:2.3:a:f5:nginx_open_source:1.5.4
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cpe:2.3:a:f5:nginx_open_source:1.5.5
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cpe:2.3:a:f5:nginx_open_source:1.5.6
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cpe:2.3:a:f5:nginx_open_source:1.5.7
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cpe:2.3:a:f5:nginx_open_source:1.5.8
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cpe:2.3:a:f5:nginx_open_source:1.5.9
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cpe:2.3:a:f5:nginx_open_source:1.7.0
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cpe:2.3:a:f5:nginx_open_source:1.7.1
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cpe:2.3:a:f5:nginx_open_source:1.7.10
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cpe:2.3:a:f5:nginx_open_source:1.7.11
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cpe:2.3:a:f5:nginx_open_source:1.7.12
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cpe:2.3:a:f5:nginx_open_source:1.7.2
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cpe:2.3:a:f5:nginx_open_source:1.7.3
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cpe:2.3:a:f5:nginx_open_source:1.7.4
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cpe:2.3:a:f5:nginx_open_source:1.7.5
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cpe:2.3:a:f5:nginx_open_source:1.7.6
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cpe:2.3:a:f5:nginx_open_source:1.7.7
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cpe:2.3:a:f5:nginx_open_source:1.7.8
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cpe:2.3:a:f5:nginx_open_source:1.7.9
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cpe:2.3:a:f5:nginx_open_source:1.9.0
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cpe:2.3:a:f5:nginx_open_source:1.9.1
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cpe:2.3:a:f5:nginx_open_source:1.9.10
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cpe:2.3:a:f5:nginx_open_source:1.9.11
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cpe:2.3:a:f5:nginx_open_source:1.9.12
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cpe:2.3:a:f5:nginx_open_source:1.9.13
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cpe:2.3:a:f5:nginx_open_source:1.9.14
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cpe:2.3:a:f5:nginx_open_source:1.9.15
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cpe:2.3:a:f5:nginx_open_source:1.9.2
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cpe:2.3:a:f5:nginx_open_source:1.9.3
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cpe:2.3:a:f5:nginx_open_source:1.9.4
-
cpe:2.3:a:f5:nginx_open_source:1.9.5
-
cpe:2.3:a:f5:nginx_open_source:1.9.6
-
cpe:2.3:a:f5:nginx_open_source:1.9.7
-
cpe:2.3:a:f5:nginx_open_source:1.9.8
-
cpe:2.3:a:f5:nginx_open_source:1.9.9
-
cpe:2.3:a:f5:nginx_plus:r30
-
cpe:2.3:a:f5:nginx_plus:r31
-
cpe:2.3:a:f5:nginx_plus:r32
-
cpe:2.3:a:f5:nginx_plus:r33
-
cpe:2.3:a:f5:nginx_plus:r34