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Vulnerabilities
Vulnerable Software

Vulnerability Details 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 14.9%
CVSS Severity
CVSS v3 Score 6.8
CVSS v2 Score 7.2
Products affected by CVE-2021-1453
  • Cisco » Ios Xe » Version: 16.10.1
    cpe:2.3:o:cisco:ios_xe:16.10.1
  • Cisco » Ios Xe » Version: 16.10.1e
    cpe:2.3:o:cisco:ios_xe:16.10.1e
  • Cisco » Ios Xe » Version: 16.10.1s
    cpe:2.3:o:cisco:ios_xe:16.10.1s
  • Cisco » Ios Xe » Version: 16.11.1
    cpe:2.3:o:cisco:ios_xe:16.11.1
  • Cisco » Ios Xe » Version: 16.11.1b
    cpe:2.3:o:cisco:ios_xe:16.11.1b
  • Cisco » Ios Xe » Version: 16.11.1c
    cpe:2.3:o:cisco:ios_xe:16.11.1c
  • Cisco » Ios Xe » Version: 16.11.1s
    cpe:2.3:o:cisco:ios_xe:16.11.1s
  • Cisco » Ios Xe » Version: 16.11.2
    cpe:2.3:o:cisco:ios_xe:16.11.2
  • Cisco » Ios Xe » Version: 16.12.1
    cpe:2.3:o:cisco:ios_xe:16.12.1
  • Cisco » Ios Xe » Version: 16.12.1c
    cpe:2.3:o:cisco:ios_xe:16.12.1c
  • Cisco » Ios Xe » Version: 16.12.1s
    cpe:2.3:o:cisco:ios_xe:16.12.1s
  • Cisco » Ios Xe » Version: 16.12.2
    cpe:2.3:o:cisco:ios_xe:16.12.2
  • Cisco » Ios Xe » Version: 16.12.2s
    cpe:2.3:o:cisco:ios_xe:16.12.2s
  • Cisco » Ios Xe » Version: 16.12.2t
    cpe:2.3:o:cisco:ios_xe:16.12.2t
  • Cisco » Ios Xe » Version: 16.12.3
    cpe:2.3:o:cisco:ios_xe:16.12.3
  • Cisco » Ios Xe » Version: 16.12.3a
    cpe:2.3:o:cisco:ios_xe:16.12.3a
  • Cisco » Ios Xe » Version: 16.12.3s
    cpe:2.3:o:cisco:ios_xe:16.12.3s
  • Cisco » Ios Xe » Version: 16.12.4
    cpe:2.3:o:cisco:ios_xe:16.12.4
  • Cisco » Ios Xe » Version: 16.12.4a
    cpe:2.3:o:cisco:ios_xe:16.12.4a
  • Cisco » Ios Xe » Version: 16.6.1
    cpe:2.3:o:cisco:ios_xe:16.6.1
  • Cisco » Ios Xe » Version: 16.6.2
    cpe:2.3:o:cisco:ios_xe:16.6.2
  • Cisco » Ios Xe » Version: 16.6.3
    cpe:2.3:o:cisco:ios_xe:16.6.3
  • Cisco » Ios Xe » Version: 16.6.4
    cpe:2.3:o:cisco:ios_xe:16.6.4
  • Cisco » Ios Xe » Version: 16.6.4a
    cpe:2.3:o:cisco:ios_xe:16.6.4a
  • Cisco » Ios Xe » Version: 16.6.4s
    cpe:2.3:o:cisco:ios_xe:16.6.4s
  • Cisco » Ios Xe » Version: 16.6.5
    cpe:2.3:o:cisco:ios_xe:16.6.5
  • Cisco » Ios Xe » Version: 16.6.6
    cpe:2.3:o:cisco:ios_xe:16.6.6
  • Cisco » Ios Xe » Version: 16.6.7
    cpe:2.3:o:cisco:ios_xe:16.6.7
  • Cisco » Ios Xe » Version: 16.6.8
    cpe:2.3:o:cisco:ios_xe:16.6.8
  • Cisco » Ios Xe » Version: 16.7.1
    cpe:2.3:o:cisco:ios_xe:16.7.1
  • Cisco » Ios Xe » Version: 16.8.1
    cpe:2.3:o:cisco:ios_xe:16.8.1
  • Cisco » Ios Xe » Version: 16.8.1a
    cpe:2.3:o:cisco:ios_xe:16.8.1a
  • Cisco » Ios Xe » Version: 16.8.1s
    cpe:2.3:o:cisco:ios_xe:16.8.1s
  • Cisco » Ios Xe » Version: 16.9.1
    cpe:2.3:o:cisco:ios_xe:16.9.1
  • Cisco » Ios Xe » Version: 16.9.1s
    cpe:2.3:o:cisco:ios_xe:16.9.1s
  • Cisco » Ios Xe » Version: 16.9.2
    cpe:2.3:o:cisco:ios_xe:16.9.2
  • Cisco » Ios Xe » Version: 16.9.2s
    cpe:2.3:o:cisco:ios_xe:16.9.2s
  • Cisco » Ios Xe » Version: 16.9.3
    cpe:2.3:o:cisco:ios_xe:16.9.3
  • Cisco » Ios Xe » Version: 16.9.3s
    cpe:2.3:o:cisco:ios_xe:16.9.3s
  • Cisco » Ios Xe » Version: 16.9.4
    cpe:2.3:o:cisco:ios_xe:16.9.4
  • Cisco » Ios Xe » Version: 16.9.5
    cpe:2.3:o:cisco:ios_xe:16.9.5
  • Cisco » Ios Xe » Version: 16.9.6
    cpe:2.3:o:cisco:ios_xe:16.9.6
  • Cisco » Ios Xe » Version: 17.1.1
    cpe:2.3:o:cisco:ios_xe:17.1.1
  • Cisco » Ios Xe » Version: 17.1.1s
    cpe:2.3:o:cisco:ios_xe:17.1.1s
  • Cisco » Ios Xe » Version: 17.1.1t
    cpe:2.3:o:cisco:ios_xe:17.1.1t
  • Cisco » Ios Xe » Version: 17.1.2
    cpe:2.3:o:cisco:ios_xe:17.1.2
  • Cisco » Ios Xe » Version: 17.2.1
    cpe:2.3:o:cisco:ios_xe:17.2.1
  • Cisco » Ios Xe » Version: 17.2.1a
    cpe:2.3:o:cisco:ios_xe:17.2.1a
  • Cisco » Ios Xe » Version: 17.2.3
    cpe:2.3:o:cisco:ios_xe:17.2.3
  • Cisco » Ios Xe » Version: 17.3.1
    cpe:2.3:o:cisco:ios_xe:17.3.1
  • Cisco » Ios Xe » Version: 17.3.2
    cpe:2.3:o:cisco:ios_xe:17.3.2
  • Cisco » Ios Xe » Version: 17.3.2a
    cpe:2.3:o:cisco:ios_xe:17.3.2a
  • Cisco » Ios Xe » Version: 17.4.1
    cpe:2.3:o:cisco:ios_xe:17.4.1
  • Cisco » Ios Xe » Version: 3.15.1xbs
    cpe:2.3:o:cisco:ios_xe:3.15.1xbs
  • Cisco » Ios Xe » Version: 3.15.2xbs
    cpe:2.3:o:cisco:ios_xe:3.15.2xbs


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