Command Injection in Cisco Systems, Inc products - CVE-2021-34725

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Main Vulnerability Database Vulnerabilities #VU56872

Command Injection in Cisco Systems, Inc products - CVE-2021-34725

Published: September 24, 2021


Vulnerability identifier: #VU56872
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-2021-34725
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 improper input validation in the CLI. 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 1000 Series Integrated Services Routers
Cisco 4000 Series Integrated Services Routers
Cisco ASR 1000 Series Aggregation Services Routers
Cisco Cloud Services Router 1000V Series
Cisco IOS XE SD-WAN

How to mitigate CVE-2021-34725

Install updates from vendor's website.

Cisco IOS XE SD-WAN - addressed in versions 16.12(3.28), 16.12.4, 17.2(1.38), 17.2.2, 17.3(0.165), 17.3.1, 17.4(0.26), 17.4.1, 17.4.1 b, 18.4.6, 19.2.3, 19.2.4, 19.2.31, 20.1.2, 20.1.12, 20.3.1, 20.3.2, 20.3.2.1, 20.3.3, 20.3.3.1, 20.4.1, 20.4.1.1

External References

Related Security Bulletins