Command Injection in Cisco IOS XE and Cisco IOS XE SD-WAN - CVE-2021-34729

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Main Vulnerability Database Vulnerabilities #VU56863

Command Injection in Cisco IOS XE and Cisco IOS XE SD-WAN - CVE-2021-34729

Published: September 24, 2021


Vulnerability identifier: #VU56863
CSH Severity: Low
CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-34729
CWE-ID: CWE-77
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to execute arbitrary commands on the target system.

The vulnerability exists due to insufficient validation of arguments passed to certain CLI commands. A local administrator can pass specially crafted data to the application and execute arbitrary commands on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


Affected software

Cisco IOS XE
Cisco IOS XE SD-WAN

How to mitigate CVE-2021-34729

Install updates from vendor's website.

Cisco IOS XE - addressed in versions 16.12.5, 17.2.3, 17.3.1a, 17.3.2, 17.3.3, 17.3.4a, 17.4.1a, 17.4.1b, 17.4.2, 17.5.1a, 17.6.1a
Cisco IOS XE SD-WAN - addressed in versions 16.12.5, 17.2.3, 17.3.1a, 17.3.2, 17.3.3, 17.3.4a, 17.4.1a, 17.4.2, 17.5.1a, 17.6.1a

External References

Related Security Bulletins