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CVE-2026-815789.8/CRITICALEPSS 94.0%CISA KEV
2026-08-28

PaperCut MF/NG Web Management Interface Improper Access Control Vulnerability (CVE-2026-81578) Advisory

[Affected Scope] Web management interface of PaperCut MF and PaperCut NG.

[Impact] Unauthenticated remote attackers can trigger backend actions and modify system configurations before access validation checks complete, potentially leading to Remote Code Execution (RCE).

[Mitigation] Apply the official vendor security patches immediately and restrict external access to the web management ports (default 9191, 9192).