---
title: "CVE-2026-82077: PaperCut NG and PaperCut MF - Command Injection"
description: "PaperCut NG and PaperCut MF contain a path traversal vulnerability in the Scan-to-Fax component caused by improper limitation of pathname, letting authenticated administrators execute arbitrary commands on the host via crafted fax provider settings."
url: https://panop.io/threat-heartbeat/CVE-2026-82077/
---

# CVE-2026-82077 PaperCut NG and PaperCut MF - Command Injection

PaperCut NG and PaperCut MF contain a path traversal vulnerability in the Scan-to-Fax component caused by improper limitation of pathname, letting authenticated administrators execute arbitrary commands on the host via crafted fax provider settings.

CVSS base score 7.3 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.74% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-82077)

## Details

Type

Command Injection

Impact

Remote Code Execution

CVSS vector

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/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

Published

24 September 2026

Updated

15 October 2026

Weakness

[CWE-22](https://cwe.mitre.org/data/definitions/22.html)

## Vendor fix

Update to the latest version of PaperCut NG and PaperCut MF.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-82077](https://nvd.nist.gov/vuln/detail/CVE-2026-82077)
- [https://www.papercut.com/kb/Main/security-bulletin-sep-2026/](https://www.papercut.com/kb/Main/security-bulletin-sep-2026/)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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