Vulnerability Details CVE-2026-53904
MCO is vulnerable to Account Denial of Service due to improper implementation of password reset functionality. Each password reset request invalidates previously set password as well as previously issued temporary passwords, furthermore, password resets are not limited in any way. An attacker who provides victim's email and answer to their security question, can successfully initiate the reset process and continuously invalidate credentials, effectively locking the victim out of their account. Answering security questions has a limited number of tries which lowers the risk of this vulnerability.
Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 25.3.3.1 but may also affect other versions.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 13.7%
CVSS Severity
CVSS v3 Score 7.1
Products affected by CVE-2026-53904
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cpe:2.3:a:mycomplianceoffice:mco:25.3.3.1