CISA Adds One Known Exploited Vulnerability to Catalog
CISA adds Palo Alto Networks PAN-OS authentication bypass CVE-2026-0257 to Known Exploited Vulnerabilities Catalog.
Summary
CISA has added CVE-2026-0257, a Palo Alto Networks PAN-OS authentication bypass vulnerability, to its Known Exploited Vulnerabilities (KEV) Catalog based on evidence of active exploitation. The vulnerability poses significant risk to federal enterprise networks and requires remediation by Federal Civilian Executive Branch agencies under Binding Operational Directive (BOD) 22-01. CISA urges all organizations to prioritize patching this vulnerability as part of their vulnerability management practices.
Full text
Alert CISA Adds One Known Exploited Vulnerability to Catalog Release DateMay 29, 2026 CISA has added one new vulnerability to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation. CVE-2026-0257 Palo Alto Networks PAN-OS Authentication Bypass Vulnerability This type of vulnerability is a frequent attack vectors for malicious cyber actors and poses significant risks to the federal enterprise. Binding Operational Directive (BOD) 22-01: Reducing the Significant Risk of Known Exploited Vulnerabilities established the KEV Catalog as a living list of known Common Vulnerabilities and Exposures (CVEs) that carry significant risk to the federal enterprise. BOD 22-01 requires Federal Civilian Executive Branch (FCEB) agencies to remediate identified vulnerabilities by the due date to protect FCEB networks against active threats. See the BOD 22-01 Fact Sheet for more information. Although BOD 22-01 only applies to FCEB agencies, CISA strongly urges all organizations to reduce their exposure to cyberattacks by prioritizing timely remediation of KEV Catalog vulnerabilities as part of their vulnerability management practice. CISA will continue to add vulnerabilities to the catalog that meet the specified criteria. 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-2026-0257