netVigilance Vulnerability intelligence since 2004
CVE-2026-81578 · netVigilance record NV26-0202

PaperCut NG/MF Missing Authentication for Critical Function

active

What to do

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.

CISA deadline 2026-09-14 · due in 4 days · applies to US federal civilian agencies; used elsewhere as a reference SLA

What happened

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.

Who is affected

PaperCut NG/MF. Affected version ranges are listed in the vendor advisory and the NVD entry linked under Sources.

Weakness class: CWE-306.

Timeline

  1. Added to CISA KEVExploitation in the wild confirmed by CISA
  2. CISA remediation deadlinedue in 4 days

Sources