Universal Naming Convention (UNC) Path Injection in Cerberus FTP Server

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-82819
StatePUBLISHED
AssignerNCSC-FI
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-21 05:16:43 UTC
Updated2026-10-21 05:16:43 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v4.0 7.1 HIGH from db4dfee8-a97e-4877-bfae-eba6d14a2166

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/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

Problem Types: CWE-40 | CWE-40 CWE-40 Path traversal: '\\UNC\share\name\' (windows UNC share)

VersionSourceTypeScoreSeverityVector
4.0db4dfee8-a97e-4877-bfae-eba6d14a2166Secondary7.1HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/C...
4.0CNACVSS7.1HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Confidentiality
High
Integrity
None
Availability
None
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

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/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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Cerberus Cerberus FTP Server affected 2026.3.0 custom Windows

References

ReferenceSourceLinkTags
labs.reversec.com/advisories/2026/09/universal-naming-convention-unc-path-injec... db4dfee8-a97e-4877-bfae-eba6d14a2166 labs.reversec.com
www.cerberusftp.com/releasenotes db4dfee8-a97e-4877-bfae-eba6d14a2166 www.cerberusftp.com
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