Cisco has released security updates to address vulnerabilities in multiple Cisco products. An attacker could exploit some of these vulnerabilities to take control of an affected system.

More information on vulnerabilities and security updates can be found in the following Cisco security advisories:

• Cisco IOS XR Software for ASR 9000 Series Routers Denial of Service Vulnerability — CVE-2021-34713;

• Cisco IOS XR Software Denial of Service Vulnerability — CVE-2021-34720;

• Cisco IOS XR Software Arbitrary File Read and Write Vulnerability — CVE-2021-34718;

• Cisco IOS XR Software Authenticated User Privilege Escalation Vulnerabilities — CVE-2021-34719, CVE-2021-34728.