Vulnerability · Published Oct 21, 2026 · Assigned by NCSC-FI

CVE-2026-82819Universal Naming Convention (UNC) Path Injection in Cerberus FTP Server

High 7.1

In plain English

A high-severity security flaw in Cerberus FTP Server from Cerberus. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).

Severity (CVSS 4.0)7.1High

Exploit odds (30 days)0.5%top 60.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A vulnerability in Cerberus FTP Server allows an authenticated remote attacker to perform UNC path injection via a manipulated parameter. By supplying a malicious SMB share path, an attacker can execute authentication coercion against the underlying server, resulting in the leakage of the Cerberus service account's Net-NTLMv2 hash. This issue has been resolved in Cerberus FTP Server: 2026.3.0.

Affected products (as reported)

Vendor	Product	Versions
Cerberus	Cerberus FTP Server	0 – before 2026.3.0

Weakness: CWE-40 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

References

https://www.cerberusftp.com/releasenotes/ release-notes
https://labs.reversec.com/advisories/2026/09/universal-naming-convention-unc-path-injection-in-cerberus-ftp-server third-party-advisory