Vulnerability Details CVE-2026-86128
A NULL pointer dereference vulnerability in Fireware OS's NetFlow packet-processing feature allows a remote, unauthenticated attacker to cause a denial of service by sending a specially crafted IPv6 packet.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 28.4%
CVSS Severity
CVSS v3 Score 7.5
References
Products affected by CVE-2026-86128
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cpe:2.3:o:watchguard:fireware:12.0.0
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cpe:2.3:o:watchguard:fireware:12.0.1
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cpe:2.3:o:watchguard:fireware:12.0.2
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cpe:2.3:o:watchguard:fireware:12.1
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cpe:2.3:o:watchguard:fireware:12.1.1
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cpe:2.3:o:watchguard:fireware:12.1.3
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cpe:2.3:o:watchguard:fireware:12.1.4
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cpe:2.3:o:watchguard:fireware:12.12
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cpe:2.3:o:watchguard:fireware:12.12.1
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cpe:2.3:o:watchguard:fireware:12.2.0
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cpe:2.3:o:watchguard:fireware:12.2.1
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cpe:2.3:o:watchguard:fireware:12.3
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cpe:2.3:o:watchguard:fireware:12.3.1
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cpe:2.3:o:watchguard:fireware:12.4
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cpe:2.3:o:watchguard:fireware:12.4.1
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cpe:2.3:o:watchguard:fireware:12.5
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cpe:2.3:o:watchguard:fireware:12.5.1
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cpe:2.3:o:watchguard:fireware:12.5.10
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cpe:2.3:o:watchguard:fireware:12.5.11
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cpe:2.3:o:watchguard:fireware:12.5.12
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cpe:2.3:o:watchguard:fireware:12.5.13
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cpe:2.3:o:watchguard:fireware:12.5.14
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cpe:2.3:o:watchguard:fireware:12.5.15
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cpe:2.3:o:watchguard:fireware:12.5.17
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cpe:2.3:o:watchguard:fireware:12.5.18
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cpe:2.3:o:watchguard:fireware:12.5.19
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cpe:2.3:o:watchguard:fireware:12.5.2
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cpe:2.3:o:watchguard:fireware:12.5.3
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cpe:2.3:o:watchguard:fireware:12.5.4
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cpe:2.3:o:watchguard:fireware:12.5.5
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cpe:2.3:o:watchguard:fireware:12.5.6
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cpe:2.3:o:watchguard:fireware:12.5.7
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cpe:2.3:o:watchguard:fireware:12.5.8
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cpe:2.3:o:watchguard:fireware:12.5.9
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cpe:2.3:o:watchguard:fireware:2025.1
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cpe:2.3:o:watchguard:fireware:2025.1.1
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cpe:2.3:o:watchguard:fireware:2025.1.2
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cpe:2.3:o:watchguard:fireware:2025.1.3
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cpe:2.3:o:watchguard:fireware:2025.1.4
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cpe:2.3:o:watchguard:fireware:2026.1
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cpe:2.3:o:watchguard:fireware:2026.1.1
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cpe:2.3:o:watchguard:fireware:2026.1.2
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cpe:2.3:o:watchguard:fireware:2026.2
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cpe:2.3:o:watchguard:fireware:2026.2.1
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cpe:2.3:o:watchguard:fireware:2026.3