Path Traversal Vulnerability in PaperCut NG and MF Affects Fax Component
CVE-2026-82077

7.3HIGH

Key Information:

Vendor

Papercut

Status
Papercut Ng/mf
Vendor
CVE Published:
24 September 2026

What is CVE-2026-82077?

A vulnerability exists in the Scan-to-Fax component of PaperCut NG and PaperCut MF that permits authenticated administrators to bypass path restrictions. This flaw allows for arbitrary command execution on the underlying host by manipulating crafted settings within the fax provider.

Affected Version(s)

PaperCut NG/MF 0 < 25.0.13

PaperCut NG/MF 26.0.0 < 26.0.5

References

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

CVSS V4

Score:
7.3
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Piotr Bazydlo (@chudyPB) of watchTowr
.