CISA Adds One Known Exploited Vulnerability to Catalog

CISA has added CVE-2026-20131 to its Known Exploited Vulnerabilities (KEV) Catalog, a critical deserialization vulnerability affecting Cisco Secure Firewall Management Center (FMC) Software and Cisco Security Cloud Control (SCC). The vulnerability allows deserialization of untrusted data, a frequent attack vector exploited by malicious cyber actors. CISA's Binding Operational Directive (BOD) 22-01 mandates that Federal Civilian Executive Branch (FCEB) agencies remediate this vulnerability by the specified due date. While the directive applies specifically to FCEB agencies, CISA strongly recommends all organizations prioritize timely remediation of KEV Catalog vulnerabilities as part of their vulnerability management practices. This deserialization flaw poses significant risks to enterprise networks and should be treated as a high-priority remediation item.

CISA has added one new vulnerability to its Known Exploited Vulnerabilities (KEV) Catalog , based on evidence of active exploitation. CVE-2026-20131 Cisco Secure Firewall Management Center (FMC) Software and Cisco Security Cloud Control (SCC) Firewall Management Deserialization of Untrusted Data 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 CVE-2026-20131 to its Known Exploited Vulnerabilities (KEV) Catalog, a critical deserialization vulnerability affecting Cisco Secure Firewall Management Center (FMC) Software and Cisco Security Cloud Control (SCC). The vulnerability allows deserialization of untrusted data, a frequent attack vector exploited by malicious cyber actors. CISA's Binding Operational Directive (BOD) 22-01 mandates that Federal Civilian Executive Branch (FCEB) agencies remediate this vulnerability by the specified due date. While the directive applies specifically to FCEB agencies, CISA strongly recommends all organizations prioritize timely remediation of KEV Catalog vulnerabilities as part of their vulnerability management practices. This deserialization flaw poses significant risks to enterprise networks and should be treated as a high-priority remediation item. CISA has added one new vulnerability to its Known Exploited Vulnerabilities (KEV) Catalog , based on evidence of active exploitation. CVE-2026-20131 Cisco Secure Firewall Management Center (FMC) Software and Cisco Security Cloud Control (SCC) Firewall Management Deserialization of Untrusted Data 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-2026-20131 Cisco Secure Firewall Management Center (FMC) Software and Cisco Security Cloud Control (SCC) Firewall Management Deserialization of Untrusted Data 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 .