CVE-2021-1453

A vulnerability in the software image verification functionality of Cisco IOS XE Software for the Cisco Catalyst 9000 Family of switches could allow an unauthenticated, physical attacker to execute unsigned code at system boot time. The vulnerability is due to an improper check in the code function that manages the verification of the digital signatures of system image files during the initial boot process. An attacker could exploit this vulnerability by loading unsigned software on an affected device. A successful exploit could allow the attacker to boot a malicious software image or execute unsigned code and bypass the image verification check part of the secure boot process of an affected device. To exploit this vulnerability, the attacker would need to have unauthenticated physical access to the device or obtain privileged access to the root shell on the device.

• CWE-347

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-xe-cat-verify-BQ5hrXgHVendor Advisory
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-xe-cat-verify-BQ5hrXgHVendor Advisory

Published

Mar 24, 2021

Last Modified

Jun 17, 2026

Status

Modified

• Same Subject, Wrong User: A Cross-Issuer Account Takeover in n8nStrix found an identity-binding bug in n8n's token-exchange flow enabling account takeover.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2021-1447A vulnerability in the user account management system of Cis…6.7
• CVE-2021-1448A vulnerability in the CLI of Cisco Firepower Threat Defense…7.8
• CVE-2021-1449A vulnerability in the boot logic of Cisco Access Points Sof…6.7
• CVE-2021-1450A vulnerability in the interprocess communication (IPC) chan…5.5
• CVE-2021-1451A vulnerability in the Easy Virtual Switching System (VSS) f…9.8
• CVE-2021-1452A vulnerability in the ROM Monitor (ROMMON) of Cisco IOS XE …6.8
• CVE-2021-1454Multiple vulnerabilities in the CLI of Cisco IOS XE SD-WAN S…6.7
• CVE-2021-1455Multiple vulnerabilities in the web-based management interfa…4.8
• CVE-2021-1456Multiple vulnerabilities in the web-based management interfa…4.8
• CVE-2021-1457Multiple vulnerabilities in the web-based management interfa…4.8
• CVE-2021-1458Multiple vulnerabilities in the web-based management interfa…4.8
• CVE-2021-1459A vulnerability in the web-based management interface of Cis…9.8