Ref# ADV2026_168 | Date: Mar 19th 2026

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Cisco published a security advisory highlighting vulnerabilities in the following product on March 18th, 2026. It is recommended that you take the necessary precautions by ensuring your products are always updated. 

• Cisco Security Cloud Control (SCC) Firewall Management – all versions 

• Cisco Secure Firewall Management Center (FMC) – all versions 

• Cisco Secure Firewall Adaptive Security Appliance (ASA) – versions prior to 9.20.4.14 

• Cisco Secure Firewall Threat Defense (FTD) – all versions 

For more information on this update, you can follow these URLs: 

• Cisco Secure Firewall Management Center Software Authentication Bypass Vulnerability 

• Cisco Secure Firewall Management Center Software Remote Code Execution Vulnerability 

• Cisco Secure Firewall Adaptive Security Appliance Software TCP Flood Denial of Service Vulnerability 

• Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software IPsec Denial of Service Vulnerability 

 

The Guyana National CIRT recommends that users and administrators review these updates and apply them where necessary. 

PDF Download: Cisco_Security_Advisory

References 

• Cisco Security advisories. (March 18th, 2026). Retrieved from Canadian Centre for Cyber Security
  https://www.cyber.gc.ca/en/alerts-advisories/cisco-security-advisory-av26-197 

• Security advisories. (n.d.). https://sec.cloudapps.cisco.com/security/center/publicationListing.x