---
id: CVE-2025-34181
title: "NetSupport Manager\_< 14.12.0001 contains an arbitrary file write vulnerability in its Connectivity Server/Gateway PUTFILE request handler"
summary: "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 …"
severity: none
cwe:
  - CWE-22
published: '2025-12-15'
updated: '2026-10-07'
sourceUpdated: '2026-10-07T19:10:00.160'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-34181'
references:
  - url: >-
      https://kb.netsupportsoftware.com/knowledge-base/updating-and-securing-netsupport-manager/
    label: disclosure@vulncheck.com
  - url: 'https://ret2.me/post/2025-12-04-exploiting-netsupport-gateway/'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/netsupport-manager-authenticated-path-traversal-arbitrary-write-rce
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.01036
epssPercentile: 0.62736
ingestedAt: '2026-10-07T19:44:15.688Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.