CVE-2026-81578: CWE-305 Authentication bypass by primary weakness in PaperCut PaperCut MF/NG
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.
CVSS v4.0
Score 8.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-81578 is an improper access control vulnerability affecting the web management interface of PaperCut MF and PaperCut NG. Under specific conditions, unauthenticated remote attackers can invoke administrative backend actions prior to the completion of access validation checks, allowing unauthorized modification of system configurations. The vulnerability is classified under CWE-305 (Improper Authentication). No patch or official remediation details are provided in the available data. There are no known exploits in the wild, and the affected software versions are not explicitly stated.
Potential Impact
An unauthenticated remote attacker can modify certain system configurations by exploiting this vulnerability, potentially compromising the integrity of the affected PaperCut MF and PaperCut NG systems. This could lead to unauthorized changes in system behavior or settings, impacting operational security.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the web management interface to trusted networks and monitor for unusual administrative activity.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-44wc-j6f2-7fjr
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-81578"]
- Database Specific Severity
- HIGH
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a95bf07acd9273b49667812
Added to database: 08/31/2026, 17:51:03 UTC
Last enriched: 09/07/2026, 22:37:09 UTC
Last updated: 10/14/2026, 06:48:21 UTC
Views: 92
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