cbcvebase.
CVE-2026-20040
published 2026-03-11

CVE-2026-20040: A vulnerability in the CLI of Cisco IOS XR Software could allow an authenticated, local attacker to execute arbitrary commands as root on the underlying…

PriorityP357high8.8CVSS 3.1
AVLACLPRLUINSCCHIHAH
EPSS
0.17%
6.8th percentile
A vulnerability in the CLI of Cisco IOS XR Software could allow an authenticated, local attacker to execute arbitrary commands as root on the underlying operating system of an affected device. This vulnerability is due to insufficient validation of user arguments that are passed to specific CLI commands. An attacker with a low-privileged account could exploit this vulnerability by using crafted commands at the prompt. A successful exploit could allow the attacker to elevate privileges to root and execute arbitrary commands on the underlying operating system.

Affected

119 ranges· showing 25
VendorProductVersion rangeFixed in
ciscocisco_ios_xr_software——
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CVSS provenance

nvdv3.18.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
vendor_cisco8.8HIGH
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