Vulnerability
CVE-2026-81578 — PaperCut NG/MF Missing Authentication for Critical Function Vulnerability
high 8.8 Exploited in the wild 4 stories · 3 outlets
Impacted if
- PaperCut MF/NG < 24.1.10 · < 25.0.13 · < 26.0.5
over the network · no login
An improper access control vulnerability exists in the web management interface of PaperCut MF and PaperCut NG.
CISA Known Exploited Vulnerabilities
Added on 2026-08-31, federal remediation due 2026-09-14. 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.
Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
First seen by AX-NEWS · latest story . Severity: NVD, or the CVE record while the NVD has not scored it. This product uses data from the NVD API but is not endorsed or certified by the NVD.