PaperCut NG/MF: Remote Code Execution via Scan2Fax
Summary
| CVE | CVE-2026-82077 |
|---|---|
| State | PUBLISHED |
| Assigner | PaperCut |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-24 07:16:33 UTC |
| Updated | 2026-09-24 21:08:22 UTC |
| 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. |
Risk And Classification
Primary CVSS: v4.0 7.3 HIGH from eb41dac7-0af8-4f84-9f6d-0272772514f4
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
Problem Types: CWE-22 | CWE-78 | CWE-22 CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') | CWE-78 CWE-78 Improper neutralization of special elements used in an OS command ('OS command injection')
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | eb41dac7-0af8-4f84-9f6d-0272772514f4 | Secondary | 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/C... |
| 4.0 | CNA | CVSS | 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 |
CVSS v4.0 Breakdown
Attack Vector
NetworkAttack Complexity
LowAttack Requirements
NonePrivileges Required
HighUser Interaction
NoneConfidentiality
HighIntegrity
HighAvailability
HighSub Conf.
NoneSub Integrity
NoneSub Availability
NoneCVSS: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
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | PaperCut | PaperCut NG/MF | affected 25.0.13 semver | Not specified |
| CNA | PaperCut | PaperCut NG/MF | affected 26.0.0 26.0.5 semver | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| www.papercut.com/kb/Main/security-bulletin-sep-2026 | eb41dac7-0af8-4f84-9f6d-0272772514f4 | www.papercut.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Piotr Bazydlo (@chudyPB) of watchTowr (en)
There are currently no legacy QID mappings associated with this CVE.