CISA Adds One Known Exploited Vulnerability to Catalog

The Cybersecurity and Infrastructure Security Agency (CISA) has updated its Known Exploited Vulnerabilities (KEV) Catalog to include CVE-2026-34197, an improper input validation vulnerability affecting Apache ActiveMQ. Evidence confirms active exploitation of this flaw by malicious cyber actors, posing significant risks to federal enterprises and broader organizations. This addition mandates remediation for Federal Civilian Executive Branch agencies under Binding Operational Directive 22-01. While the directive specifically targets federal entities, CISA strongly advises all organizations to prioritize patching this vulnerability to mitigate potential cyberattacks. The vulnerability serves as a frequent attack vector, highlighting the critical need for robust vulnerability management practices. Immediate action is required to secure networks against active threats leveraging this weakness. Organizations should verify their exposure and apply vendor patches promptly to prevent unauthorized access and potential compromise of critical messaging infrastructure.

CISA has added one new vulnerability to its Known Exploited Vulnerabilities (KEV) Catalog , based on evidence of active exploitation. CVE-2026-34197 Apache ActiveMQ Improper Input Validation Vulnerability This type of vulnerability is a frequent attack vector 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 .

The Cybersecurity and Infrastructure Security Agency (CISA) has updated its Known Exploited Vulnerabilities (KEV) Catalog to include CVE-2026-34197, an improper input validation vulnerability affecting Apache ActiveMQ. Evidence confirms active exploitation of this flaw by malicious cyber actors, posing significant risks to federal enterprises and broader organizations. This addition mandates remediation for Federal Civilian Executive Branch agencies under Binding Operational Directive 22-01. While the directive specifically targets federal entities, CISA strongly advises all organizations to prioritize patching this vulnerability to mitigate potential cyberattacks. The vulnerability serves as a frequent attack vector, highlighting the critical need for robust vulnerability management practices. Immediate action is required to secure networks against active threats leveraging this weakness. Organizations should verify their exposure and apply vendor patches promptly to prevent unauthorized access and potential compromise of critical messaging infrastructure. CISA has added one new vulnerability to its Known Exploited Vulnerabilities (KEV) Catalog , based on evidence of active exploitation. CVE-2026-34197 Apache ActiveMQ Improper Input Validation Vulnerability This type of vulnerability is a frequent attack vector 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 . CISA has added one new vulnerability to its Known Exploited Vulnerabilities (KEV) Catalog , based on evidence of active exploitation. CVE-2026-34197 Apache ActiveMQ Improper Input Validation Vulnerability This type of vulnerability is a frequent attack vector 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 .