Vulnerability · Published Dec 15, 2025 · Assigned by VulnCheck

CVE-2025-34180NetSupport Manager < 14.12.0001 Gateway Key Reversible Encoding Credential Recovery

High 8.4

In plain English

A high-severity security flaw in Manager from NetSupport Software. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 8% of all known vulnerabilities).

Severity (CVSS 4.0)8.4High

Exploit odds (30 days)0.2%top 92.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

NetSupport Manager < 14.12.0001 relies on a shared Gateway Key for authentication between Manager/Control, Client, and Connectivity Server components. The key is stored using a reversible encoding scheme. An attacker who obtains access to a deployed client configuration file can decode the stored value to recover the plaintext Gateway Key. Possession of the Gateway Key allows unauthorized access to NetSupport Manager connectivity services and enables remote control of systems managed through the same key.

Affected products (as reported)

Vendor	Product	Versions
NetSupport Software	Manager	0 – before 14.12.0001

Weakness: CWE-257 · Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:H/SA:H

References

https://kb.netsupportsoftware.com/knowledge-base/updating-and-securing-netsupport-manager/ vendor-advisory, patch
https://www.vulncheck.com/advisories/netsupport-manager-gateway-key-reversible-encoding-credential-recovery third-party-advisory
https://ret2.me/post/2025-12-04-exploiting-netsupport-gateway/ technical-description, exploit