CVE-2025-34181
NetSupport Manager < 14.12.0001 Authenticated Path Traversal Arbitrary File Write RCE
- State
- Published
- Severity
- 8.7 High
- Published
- Dec 15, 2025
- Updated
- May 14, 2026
- Reserved
- Apr 15, 2025
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
Weaknesses
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Affected Products
| Product | Versions |
|---|---|
ManagerNetSupport Software |
|
References
- https://kb.netsupportsoftware.com/knowledge-base/updating-and-securing-netsupport-manager/vendor-advisorypatch
- https://www.vulncheck.com/advisories/netsupport-manager-authenticated-path-traversal-arbitrary-write-rcethird-party-advisory
- https://ret2.me/post/2025-12-04-exploiting-netsupport-gateway/technical-descriptionexploit
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