Vulnerability · Published Sep 24, 2026 · Assigned by PaperCut
CVE-2026-87739PaperCut MF/NG: User permissions are not evaluated on report generation
Medium 6.9
In plain English
A medium-severity authorization bypass via user-controlled key in PaperCut NG/MF from PaperCut. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities).
Severity (CVSS 4.0)6.9Medium
Exploit odds (30 days)0.4%top 62.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| PaperCut | PaperCut NG/MF | 0 – before 24.1.1025.0.0 – before 25.0.1326.0.0 – before 26.0.5 |
Weakness: CWE-639 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/AU:Y