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.
References (3)
Core 3
Core References
Various Sources vendor-advisory
patch
https://kb.netsupportsoftware.com/knowledge-base/updating-and-securing-netsupport-manager/
Third Party Advisory third-party-advisory
https://www.vulncheck.com/advisories/netsupport-manager-authenticated-path-traversal-arbitrary-write-rce
Various Sources technical-description
exploit
https://ret2.me/post/2025-12-04-exploiting-netsupport-gateway/
Scores
CVSS v4
8.7
EPSS
0.0087
EPSS Percentile
54.1%
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-22
Status
published
Products (1)
NetSupport Software/Manager
< 14.12.0001
Published
Dec 15, 2025
Tracked Since
Feb 18, 2026