CVE-2026-53906 — Path Disclosure and Path Traversal in MCO

CVE-2026-53906

Path Disclosure and Path Traversal in MCO PUBLISHED

Description (CNA)

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 (CNA)

Vendor / product	Versions
MyComplianceOffice / MCO	affected 25.3.3.1

CWE

CWE-22, CWE-209

References

https://cert.pl/en/posts/2026/07/CVE-2026-53902
https://mco.mycomplianceoffice.com/

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.