Cisco has released security updates to address vulnerabilities in multiple products. An attacker could exploit some of these vulnerabilities to take control of an affected system. For updates addressing lower severity vulnerabilities, see the Cisco Security Advisories page.

CERT Bulgaria encourages users and administrators to review the following Cisco Security Advisories and apply the necessary updates:

• Cisco Expressway Series and Cisco TelePresence Video Communication Server Vulnerabilities cisco-sa-expressway-filewrite-87Q5YRk
• Cisco Ultra Cloud Core - Subscriber Microservices Infrastructure Privilege Escalation Vulnerability cisco-sa-uccsmi-prvesc-BQHGe4cm
• Cisco Identity Services Engine RADIUS Service Denial of Service Vulnerability cisco-sa-ise-dos-JLh9TxBp
  
  https://tools.cisco.com/security/center/publicationListing.x
  
  https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-expressway-filewrite-87Q5YRk
  
  https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-uccsmi-prvesc-BQHGe4cm
  
  https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-dos-JLh9TxBp