Use the Cisco IOS Software Checker tool to search for Cisco Security Advisories that apply to specific Cisco IOS and IOS XE Software releases and have a Security Impact Rating (SIR) of Critical or High. Note that the tool does not provide information about security advisories that have a SIR of Medium. In addition, the tool does not support Cisco IOS XR Software or interim builds of Cisco IOS Software.To use the tool, choose a release from the drop-down list, enter the output of the show version command, or upload a text file that lists specific releases. To see a brief tutorial, watch the video on this page or YouTube.
The information on this page is provided on an 'as is' basis and does not imply any kind of guarantee or warranty. Cisco reserves the right to change or update this page without notice, and your use of the information or linked materials is at your own risk. This tool is intended solely to query Cisco IOS and IOS XE Software Releases against published Cisco Security Advisories with a Security Impact Rating of Critical or High; it does not account for enabled or disabled features. Customers whose Cisco products are provided or maintained through prior or existing agreements with third-party support organizations, such as Cisco Partners, authorized resellers, or service providers, should contact that support organization for guidance and assistance with the appropriate course of action in regards to any Cisco Security Advisory.