CVE-2026-81578

Description

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.

Proof of Concept (POC) Links

Explore how this vulnerability can be reproduced or exploited.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-81578