Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-81578

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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 32.4%
CVSS Severity
CVSS v3 Score 9.8
Proposed Action
PaperCut NG/MF contains a missing authentication for critical function vulnerability which allows an unauthenticated remote attacker to modify certain system configurations. This vulnerability can be chained with CVE-2026-82078.
Ransomware Campaign
Unknown
Products affected by CVE-2026-81578


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