CVE-2025-53395

High severity, CVSS 7.7. EPSS: 0.2% chance of exploitation in the next 30 days.

Paramount Macrium Reflect through 2025-06-26 allows local attackers to execute arbitrary code with administrator privileges via a crafted .mrimgx backup file and a malicious VSSSvr.dll located in the same directory. When a user with administrative privileges mounts a backup by opening the .mrimgx file, Reflect loads the attacker's VSSSvr.dll after the mount completes. This occurs because of untrusted DLL search path behavior in ReflectMonitor.exe.

Published 2025-08-04. Last modified 2026-06-17.