CVE-2021-1244: Cisco IOS XR Software for Cisco 8000 Series Routers and Network Convergence System 540 Series Routers Image Verification Vulnerabilities
Multiple vulnerabilities in Cisco Network Convergence System (NCS) 540 Series Routers, only when running Cisco IOS XR NCS540L software images, and Cisco IOS XR Software for the Cisco 8000 Series Routers could allow an authenticated, local attacker to execute unsigned code during the boot process on an affected device. For more information about these vulnerabilities, see the Details section of this advisory.
Affected Software
Event History
Frequently Asked Questions
What is CVE-2021-1244?
CVE-2021-1244 refers to multiple vulnerabilities in Cisco Network Convergence System (NCS) 540 Series Routers and Cisco IOS XR Software for the Cisco 8000 Series Routers.
What is the severity of CVE-2021-1244?
The severity of CVE-2021-1244 is medium, with a severity value of 6.7.
How can an attacker exploit CVE-2021-1244?
An authenticated, local attacker could execute unsigned code during the boot process on affected devices.
Which software versions are affected by CVE-2021-1244?
Cisco IOS XR NCS540L software images and Cisco IOS XR Software versions up to and including 7.2.1 are affected.
How can I fix CVE-2021-1244?
Upgrade to a fixed software release as mentioned in the Cisco Security Advisory.