CVE-2026-81578
KEVPaperCut NG/MF Missing Authentication for Critical Function Vulnerability
8.8
HighPublished:
Last updated:
Source:eb41dac7-0af8-4f84-9f6d-0272772514f4
Analyzed
Weakness (CWE)
CVSS Vector
v4.0- Attack Vector
- Network
- Attack Complexity
- Low
- Attack Requirements
- None
- Privileges Required
- None
- User Interaction
- None
- Confidentiality (Vulnerable)
- Low
- Integrity (Vulnerable)
- High
- Availability (Vulnerable)
- Low
- Confidentiality (Subsequent)
- None
- Integrity (Subsequent)
- None
- Availability (Subsequent)
- None
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.
References
eb41dac7-0af8-4f84-9f6d-0272772514f4
https://www.papercut.com/kb/Main/security-bulletin-27-aug-2026-urgent-security-advisory/134c704f-9b21-4f2e-91b3-4a467353bcc0
https://github.com/rapid7/metasploit-framework/pull/21842134c704f-9b21-4f2e-91b3-4a467353bcc0
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-81578