CISA Adds Two PaperCut NG/MF Vulnerabilities to Known Exploited Catalog

The Cybersecurity and Infrastructure Security Agency (CISA) added two new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog on August 31, 2026, based on evidence of active exploitation in the wild. The vulnerabilities affect PaperCut NG/MF products and are identified as CVE-2026-81578 and CVE-2026-82078.

CVE-2026-81578 is described as a Missing Authentication for Critical Function Vulnerability. CVE-2026-82078 is classified as an Unsafe Reflection Vulnerability. Both vulnerability types are recognized as frequent attack vectors for malicious cyber actors and pose significant risks to the federal enterprise.

Binding Operational Directive (BOD) 26-04: Prioritizing Security Updates Based on Risk establishes vulnerability management requirements for Federal Civilian Executive Branch (FCEB) agencies. The directive reinforces the importance of the KEV Catalog and requires federal agencies to prioritize rapid remediation of high-risk vulnerabilities listed in the KEV Catalog on publicly exposed assets that grant total control of the asset post-exploitation, while deferring action for lower-risk vulnerabilities. BOD 26-04 further establishes expectations for agencies to check whether threat actors compromised the system before the patch was applied.

While BOD 26-04 applies only to FCEB agencies, CISA encourages all organizations to adopt risk-based vulnerability management and prioritize remediation of KEV Catalog vulnerabilities. CISA will continue to add vulnerabilities to the catalog that meet the specified criteria. Organizations aware of exploited vulnerabilities not currently listed can submit them through CISA's KEV Nomination Form, which requires a CVE ID, evidence of exploitation, and clear mitigation guidance.

The two new additions bring the total number of vulnerabilities in the KEV Catalog to those posing active risk to federal and broader organizational networks.