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Description

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.

PUBLISHED Reserved 2025-10-08 | Published 2026-03-11 | Updated 2026-03-12 | Assigner cisco




HIGH: 8.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Problem types

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Product status

Default status
unknown

6.5.3
affected

6.5.29
affected

6.5.1
affected

6.6.1
affected

6.5.2
affected

6.5.92
affected

6.5.15
affected

6.6.2
affected

7.0.1
affected

6.6.25
affected

6.5.26
affected

6.6.11
affected

6.5.25
affected

6.5.28
affected

6.5.93
affected

6.6.12
affected

6.5.90
affected

7.1.1
affected

7.0.90
affected

6.6.3
affected

6.7.1
affected

7.0.2
affected

7.1.15
affected

7.2.1
affected

7.1.2
affected

6.7.2
affected

7.0.11
affected

7.0.12
affected

7.0.14
affected

7.1.25
affected

6.6.4
affected

7.2.12
affected

7.3.1
affected

7.1.3
affected

6.7.3
affected

7.4.1
affected

7.2.2
affected

6.7.4
affected

6.5.31
affected

7.3.15
affected

7.3.16
affected

6.8.1
affected

7.4.15
affected

6.5.32
affected

7.3.2
affected

7.5.1
affected

7.4.16
affected

7.3.27
affected

7.6.1
affected

7.5.2
affected

7.8.1
affected

7.6.15
affected

7.5.12
affected

7.8.12
affected

7.3.3
affected

7.7.1
affected

6.8.2
affected

7.3.4
affected

7.4.2
affected

6.7.35
affected

6.9.1
affected

7.6.2
affected

7.5.3
affected

7.7.2
affected

6.9.2
affected

7.9.1
affected

7.10.1
affected

7.8.2
affected

7.5.4
affected

6.5.33
affected

7.8.22
affected

7.7.21
affected

7.9.2
affected

7.3.5
affected

7.5.5
affected

7.11.1
affected

7.9.21
affected

7.10.2
affected

24.1.1
affected

7.6.3
affected

7.3.6
affected

7.5.52
affected

7.11.2
affected

24.2.1
affected

24.1.2
affected

24.2.11
affected

24.3.1
affected

24.4.1
affected

24.2.2
affected

7.8.23
affected

7.11.21
affected

24.2.20
affected

24.3.2
affected

24.4.10
affected

6.5.35
affected

25.1.1
affected

24.4.2
affected

24.3.20
affected

24.4.15
affected

25.2.1
affected

6.5.351
affected

25.1.2
affected

24.3.30
affected

25.3.1
affected

6.5.352
affected

24.4.30
affected

24.2.21
affected

25.4.1
affected

25.2.2
affected

25.2.15
affected

7.2.0
affected

7.0.0
affected

25.2.30
affected

6.5.353
affected

25.1.30
affected

25.3.15
affected

References

sec.cloudapps.cisco.com/...y/cisco-sa-iosxr-privesc-bF8D5U4W (cisco-sa-iosxr-privesc-bF8D5U4W)

cve.org (CVE-2026-20040)

nvd.nist.gov (CVE-2026-20040)

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