CVE-2026-81578

8.8 highKEVEPSS 85%

High (8.8) in PaperCut NG/MF. In CISA KEV since 2026-08-31. EPSS 85% chance of exploitation in the next 30 days.

An improper access control vulnerability exists in the web management interface of PaperCut MF and PaperCut NG. Under specific conditions, unauthenticated remote requests targeting administrative functions can trigger backend actions prior to the completion of access validation checks. This allows an unauthenticated remote attacker to modify certain system configurations.

Severity

CVSS 4.0

8.8 high

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N

CVSS 3.1

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 85% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-31)
CISA KEV: listed 2026-08-31, due 2026-09-14
CWE: CWE-305
Published: 2026-08-28
Modified: 2026-09-14
Record from: the NVD, synced 2026-10-19

Affected

papercut:papercut_mf
papercut:papercut_ng

References

Check your stack JSON