CVE-2025-34181 json
NetSupport Manager < 14.12.0001 Authenticated Path Traversal Arbitrary File Write RCE
published 2025-12-15 10 mo ago modified 2026-10-23 16 d ago also EUVD-2025-203378
- cvss
- 8.7
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.0%
- EPSS 1.0% chance of exploitation in 30 days, percentile 64%
- public exploits
- 0
- none known
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 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.
Patch / fix
- NetSupport Software Manager 14.12.0001
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 10 mo ago
Exploit prediction
1.04% chance of exploitation in the next 30 days, higher than 64% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- ret2.me https://ret2.me/post/2025-12-04-exploiting-netsupport-gateway/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 8.7 | 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 |
| CNA | 4.0 | 8.7 | 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 |
Affected products
- NetSupport Software Manager
Classification
- Weakness
-
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory
References
-
kb.netsupportsoftware.com
/knowledge-base/updating-and-securing-netsupport-manager/
vendor-advisory, patch
-
ret2.me
/post/2025-12-04-exploiting-netsupport-gateway/
technical-description, exploit
-
vulncheck.com
/advisories/netsupport-manager-authenticated-path-traversal-arbitrary-write-rce
third-party-advisory
Sources
- CVE List CVE-2025-34181
- NVD CVE-2025-34181
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