CVE-2026-87739 PaperCut MF/NG: User permissions are not evaluated on report generation
Unauthenticated attackers can generate reports to access sensitive information due to missing permission checks in PaperCut MF/NG.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-87739?
CVE-2026-87739 is a medium-severity missing authorization vulnerability in PaperCut NG/MF, published on 24 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An improper authentication vulnerability in PaperCut MF/NG allows an unauthenticated, remote attacker to trigger report generation. By submitting report generation requests without valid credentials, an attacker can generate reports and gain unauthorized access to sensitive information.
Weakness: CWE-639
Which versions are affected by CVE-2026-87739?
How do I fix CVE-2026-87739?
No fix has been published for CVE-2026-87739 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-87739 being exploited?
There is no known exploitation of CVE-2026-87739 in the wild and no public exploit code.
Sources
Also known as GHSA-hcgg-7hh4-grvw.