CVE-2026-53906CWE-209CWE-22

Path Disclosure and Path Traversal in MCO

Medium · published July 1, 2026

CVSS v4.0
5.1
EPSS
1%
Percentile
43.3
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
5.1 · MEDIUM
Vector
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
EPSS
0.00520 · 43.3th percentile
Weaknesses
CWE-209 · Generation of Error Message Containing Sensitive Information; CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Published
2026-07-01T11:58Z
EPSS history
Timeline
  • 01 JUL 11:58Z
    Path Disclosure and Path Traversal in MCO
    cvelistv5