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 ↗

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

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

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