CyberRota Analysis
This is a medium severity vulnerability with a CVSS score of 6.5. See the original NVD description below for full technical details.
CVE
CVE-2026-53909
Severity
MEDIUM
CVSS
6.5
EPSS
0.23%
Original NVD Description
MCO does not correctly validate types of uploaded files. File upload validation functionality relies only on client-side checks, which can be bypassed. An authorized, low-privileged attacker can upload files with arbitrary types to the server. Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 25.3.3.1 but may also affect other versions.
Related CVEs
Other vulnerabilities affecting the same vendor(s)