CISA Adds Two Known Exploited Vulnerabilities to Catalog

Summary

CISA has added two new vulnerabilities affecting PaperCut NG/MF to its Known Exploited Vulnerabilities (KEV) Catalog due to evidence of active exploitation. These vulnerabilities, CVE-2026-81578 and CVE-2026-82078, are considered high-risk, especially for federal agencies, as they can lead to total control of affected assets. CISA's Binding Operational Directive 26-04 mandates federal agencies to prioritize the remediation of these KEV-listed vulnerabilities.

Full text

Alert CISA Adds Two Known Exploited Vulnerabilities to Catalog Release DateAugust 31, 2026 CISA has added two new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation. CVE-2026-81578 PaperCut NG/MF Missing Authentication for Critical Function Vulnerability CVE-2026-82078 PaperCut NG/MF Unsafe Reflection Vulnerability These types of vulnerabilities are a frequent attack vector 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. BOD 26-04 reinforces the importance of the KEV Catalog and requires federal agencies to prioritize rapid remediation of high-risk vulnerabilities, specifically those identified by Common Vulnerabilities and Exposures (CVEs) listed in CISA’s 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 basic expectations for when agencies must 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. Aware of an exploited vulnerability not currently listed in the KEV Catalog? Submit it for potential addition through CISA’s KEV Nomination Form. Potential KEV additions must have a CVE ID, evidence of exploitation, and clear mitigation guidance. This product is provided subject to this Notification and this Privacy & Use policy. Please share your thoughts We recently updated our anonymous product survey; we welcome your feedback.

Indicators of Compromise

• cve — CVE-2026-81578
• cve — CVE-2026-82078

Entities