CVE-2021-1136

Medium

Description

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.

SeverityMedium

CVSS6.7

Exploit probability—

Product

Cisco Ios Xr

PublishedFeb 4, 2021

First seenFeb 4, 2021

Weakness typeCWE-347CWE-347

How to fix

Update

cisco ios_xr7.0.12, 7.2.1 or later

Vendor advisories

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ioxr-l-zNhcGCBt

Affected products

Product	Affected versions	Fixed in
cisco ios_xr	v < 7.0.12, 7.1.0 ≤ v < 7.2.1, v < 7.2.1	7.0.12, 7.2.1

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.