CVE-2026-53908: Mycomplianceoffice

Medium severity, CVSS 4.3. EPSS: 0.4% chance of exploitation in the next 30 days.

MCO is vulnerable to User Enumeration through authentication-related functionalities. The application returns distinguishable responses for valid and invalid users during username reminder and password reset operations. An attacker can leverage these differences to enumerate valid usernames and email addresses. Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 25.3.3.1 but may also affect other versions.

Affected products

• Mycomplianceoffice Mycomplianceoffice: version 25.3.3.1 only

Published 2026-07-01. Last modified 2026-07-06.