PaperCut NG/MF Unsafe Reflection Vulnerability

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• NewsExploited · CISA KEVPaperCut · NG/MF

  PaperCut NG/MF Unsafe Reflection Vulnerability

  CVE-2026-82078

  PaperCut NG/MF contains an unsafe reflection vulnerability that allows an attacker to manipulate system configuration parameters and execute arbitrary Java bytecode residing on the application classpath under the security context of the PaperCut server process. This vulnerability can be chained with CVE-2026-81578.

  CISA's required action · due 14 Sep 2026 for U.S. federal civilian agencies

  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.

  Cited by CISA: papercut.com · nvd.nist.gov

  Added to KEV 31 Aug 2026 · Source checked 4 Nov 2026, 16:30 UTC · CISA KEV entry

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