CVE-2025-34181: Netsupport Software Manager

High severity, CVSS 8.7. EPSS: 1% chance of exploitation in the next 30 days.

NetSupport Manager < 14.12.0001 contains an arbitrary file write vulnerability in its Connectivity Server/Gateway PUTFILE request handler. An attacker with a valid Gateway Key can supply a crafted filename containing directory traversal sequences to write files to arbitrary locations on the server. This can be leveraged to place attacker-controlled DLLs or executables in privileged paths and achieve remote code execution in the context of the NetSupport Manager connectivity service.

Affected products

• Netsupport Software Manager: before 14.12.0001 (fixed in 14.12.0001)

Published 2025-12-15. Last modified 2026-10-07.