What’s Vulnerable › Vulnerabilities

CVE-2025-34181: NetSupport Manager < 14.12.0001 Authenticated Path Traversal Arbitrary File Write RCE

• Severity: high (CVSS 8.7 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-15 · updated 2026-10-23
• Weakness: CWE-22

Description

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

How to fix

Upgrade to a fixed version: NetSupport Software Manager 14.12.0001. Check the vendor advisory for mitigations.

References

• https://kb.netsupportsoftware.com/knowledge-base/updating-and-securing-netsupport-manager/
• https://ret2.me/post/2025-12-04-exploiting-netsupport-gateway/
• https://www.vulncheck.com/advisories/netsupport-manager-authenticated-path-traversal-arbitrary-write-rce

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