CVE-2026-82077 PaperCut NG/MF: Remote Code Execution via Scan2Fax
Authenticated administrators can execute arbitrary commands on the host via path traversal in the Scan-to-Fax component of PaperCut NG/MF.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-82077?
CVE-2026-82077 is a high-severity path traversal vulnerability in PaperCut NG/MF, published on 24 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-82077?
How do I fix CVE-2026-82077?
No fix has been published for CVE-2026-82077 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-82077 being exploited?
There is no known exploitation of CVE-2026-82077 in the wild and no public exploit code.
Sources
Also known as GHSA-6392-7mrr-8qfw.