CVE-2026-53906: Mycomplianceoffice

High severity, CVSS 8.2. EPSS: 0.5% chance of exploitation in the next 30 days.

MCO is vulnerable to Path Disclosure and Path Traversal in file handling functionality related to data export and upload. Improper validation of the filename parameter allows writing files to arbitrary locations as well as indirect disclosure of absolute server paths through error messages. 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

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