OS Command Injection in Cisco IOS XR - CVE-2021-34728
Published: September 9, 2021
Vulnerability identifier: #VU56433
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-34728
CWE-ID: CWE-78
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to improper input validation in the CLI of Cisco IOS XR Software. A local user can run a specially crafted command to execute arbitrary code with root privileges.
Affected software
Cisco IOS XR
How to mitigate CVE-2021-34728
Install updates from vendor's website.
Cisco IOS XR - addressed in versions 7.3.2, 7.4.1