CVE-2026-82077

PaperCut NG/MF: Remote Code Execution via Scan2Fax

State: Published
Severity: 7.3 High
Published: Sep 24, 2026
Updated: Oct 13, 2026
Reserved: Aug 28, 2026

Description

An improper limitation of a pathname to a restricted directory (path traversal) vulnerability in the Scan-to-Fax component of PaperCut NG and PaperCut MF allows an authenticated administrator to execute arbitrary commands on the underlying host via crafted fax provider settings.

Scores

CVSS	Score	Vector	Source
4.0	7.3 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P	PaperCut

Weaknesses

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-78 Improper neutralization of special elements used in an OS command ('OS command injection')

Affected Products

Product	Versions
PaperCut NG/MFPaperCut	before 24.1.10Affected 25.0.0 to before 25.0.13Affected 26.0.0 to before 26.0.5Affected

References

https://www.papercut.com/kb/Main/security-bulletin-sep-2026/

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