CVE-2026-53906mediumCWE-209CWE-22

CVE-2026-53906: medium-severity vulnerability in MyComplianceOffice MCO

Path Disclosure and Path Traversal in MCO

Published

Follow this CVE+ Monitor MCO

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 5.1epss 0.5%
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.
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
Affected products
MyComplianceOffice · MCO
Related CVEs — MyComplianceOffice MCO

In the same product, most dangerous first.

CVE-2026-53903MEDIUMInsecure Direct Object Reference in MCOEPSS 0.4%CVE-2026-53909MEDIUMArbitrary File Upload in MCOEPSS 0.4%CVE-2026-53908MEDIUMUser Enumeration in MCOEPSS 0.4%CVE-2026-53902HIGHPrivilege Escalation in MCOEPSS 0.3%CVE-2026-53904MEDIUMAccount Denial of Service in MCOEPSS 0.3%CVE-2026-53905MEDIUMUnauthorized Access to Administrator ACL View in MCOEPSS 0.3%