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VULNERABILITIES

CVE-2021-1136 Details

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.

Metrics

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ioxr-l-zNhcGCBt CVEVendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ioxr-l-zNhcGCBt [email protected]Vendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-347Improper Verification of Cryptographic Signature[email protected]

Affected Products

ProductVersions

Change History

7 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2021-1136
NVD Published Date:
Feb 4, 2021
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2021-1136 Details - Not Deferred