CVE-2026-20040

HIGH8.8Injection

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.

CVSS breakdown

CVSS 3.1

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Affected products

Cisco / Cisco IOS XR Software6.5.3 – 6.5.3
Cisco / Cisco IOS XR Software6.5.29 – 6.5.29
Cisco / Cisco IOS XR Software6.5.1 – 6.5.1
Cisco / Cisco IOS XR Software6.6.1 – 6.6.1
Cisco / Cisco IOS XR Software6.5.2 – 6.5.2
Cisco / Cisco IOS XR Software6.5.92 – 6.5.92
Cisco / Cisco IOS XR Software6.5.15 – 6.5.15
Cisco / Cisco IOS XR Software6.6.2 – 6.6.2
Cisco / Cisco IOS XR Software7.0.1 – 7.0.1
Cisco / Cisco IOS XR Software6.6.25 – 6.6.25
Cisco / Cisco IOS XR Software6.5.26 – 6.5.26
Cisco / Cisco IOS XR Software6.6.11 – 6.6.11
Cisco / Cisco IOS XR Software6.5.25 – 6.5.25
Cisco / Cisco IOS XR Software6.5.28 – 6.5.28
Cisco / Cisco IOS XR Software6.5.93 – 6.5.93
Cisco / Cisco IOS XR Software6.6.12 – 6.6.12
Cisco / Cisco IOS XR Software6.5.90 – 6.5.90
Cisco / Cisco IOS XR Software7.1.1 – 7.1.1
Cisco / Cisco IOS XR Software7.0.90 – 7.0.90
Cisco / Cisco IOS XR Software6.6.3 – 6.6.3
Cisco / Cisco IOS XR Software6.7.1 – 6.7.1
Cisco / Cisco IOS XR Software7.0.2 – 7.0.2
Cisco / Cisco IOS XR Software7.1.15 – 7.1.15
Cisco / Cisco IOS XR Software7.2.1 – 7.2.1
Cisco / Cisco IOS XR Software7.1.2 – 7.1.2
Cisco / Cisco IOS XR Software6.7.2 – 6.7.2
Cisco / Cisco IOS XR Software7.0.11 – 7.0.11
Cisco / Cisco IOS XR Software7.0.12 – 7.0.12
Cisco / Cisco IOS XR Software7.0.14 – 7.0.14
Cisco / Cisco IOS XR Software7.1.25 – 7.1.25
Cisco / Cisco IOS XR Software6.6.4 – 6.6.4
Cisco / Cisco IOS XR Software7.2.12 – 7.2.12
Cisco / Cisco IOS XR Software7.3.1 – 7.3.1
Cisco / Cisco IOS XR Software7.1.3 – 7.1.3
Cisco / Cisco IOS XR Software6.7.3 – 6.7.3
Cisco / Cisco IOS XR Software7.4.1 – 7.4.1
Cisco / Cisco IOS XR Software7.2.2 – 7.2.2
Cisco / Cisco IOS XR Software6.7.4 – 6.7.4
Cisco / Cisco IOS XR Software6.5.31 – 6.5.31
Cisco / Cisco IOS XR Software7.3.15 – 7.3.15
Cisco / Cisco IOS XR Software7.3.16 – 7.3.16
Cisco / Cisco IOS XR Software6.8.1 – 6.8.1
Cisco / Cisco IOS XR Software7.4.15 – 7.4.15
Cisco / Cisco IOS XR Software6.5.32 – 6.5.32
Cisco / Cisco IOS XR Software7.3.2 – 7.3.2
Cisco / Cisco IOS XR Software7.5.1 – 7.5.1
Cisco / Cisco IOS XR Software7.4.16 – 7.4.16
Cisco / Cisco IOS XR Software7.3.27 – 7.3.27
Cisco / Cisco IOS XR Software7.6.1 – 7.6.1
Cisco / Cisco IOS XR Software7.5.2 – 7.5.2
Cisco / Cisco IOS XR Software7.8.1 – 7.8.1
Cisco / Cisco IOS XR Software7.6.15 – 7.6.15
Cisco / Cisco IOS XR Software7.5.12 – 7.5.12
Cisco / Cisco IOS XR Software7.8.12 – 7.8.12
Cisco / Cisco IOS XR Software7.3.3 – 7.3.3
Cisco / Cisco IOS XR Software7.7.1 – 7.7.1
Cisco / Cisco IOS XR Software6.8.2 – 6.8.2
Cisco / Cisco IOS XR Software7.3.4 – 7.3.4
Cisco / Cisco IOS XR Software7.4.2 – 7.4.2
Cisco / Cisco IOS XR Software6.7.35 – 6.7.35
Cisco / Cisco IOS XR Software6.9.1 – 6.9.1
Cisco / Cisco IOS XR Software7.6.2 – 7.6.2
Cisco / Cisco IOS XR Software7.5.3 – 7.5.3
Cisco / Cisco IOS XR Software7.7.2 – 7.7.2
Cisco / Cisco IOS XR Software6.9.2 – 6.9.2
Cisco / Cisco IOS XR Software7.9.1 – 7.9.1
Cisco / Cisco IOS XR Software7.10.1 – 7.10.1
Cisco / Cisco IOS XR Software7.8.2 – 7.8.2
Cisco / Cisco IOS XR Software7.5.4 – 7.5.4
Cisco / Cisco IOS XR Software6.5.33 – 6.5.33
Cisco / Cisco IOS XR Software7.8.22 – 7.8.22
Cisco / Cisco IOS XR Software7.7.21 – 7.7.21
Cisco / Cisco IOS XR Software7.9.2 – 7.9.2
Cisco / Cisco IOS XR Software7.3.5 – 7.3.5
Cisco / Cisco IOS XR Software7.5.5 – 7.5.5
Cisco / Cisco IOS XR Software7.11.1 – 7.11.1
Cisco / Cisco IOS XR Software7.9.21 – 7.9.21
Cisco / Cisco IOS XR Software7.10.2 – 7.10.2
Cisco / Cisco IOS XR Software24.1.1 – 24.1.1
Cisco / Cisco IOS XR Software7.6.3 – 7.6.3
Cisco / Cisco IOS XR Software7.3.6 – 7.3.6
Cisco / Cisco IOS XR Software7.5.52 – 7.5.52
Cisco / Cisco IOS XR Software7.11.2 – 7.11.2
Cisco / Cisco IOS XR Software24.2.1 – 24.2.1
Cisco / Cisco IOS XR Software24.1.2 – 24.1.2
Cisco / Cisco IOS XR Software24.2.11 – 24.2.11
Cisco / Cisco IOS XR Software24.3.1 – 24.3.1
Cisco / Cisco IOS XR Software24.4.1 – 24.4.1
Cisco / Cisco IOS XR Software24.2.2 – 24.2.2
Cisco / Cisco IOS XR Software7.8.23 – 7.8.23
Cisco / Cisco IOS XR Software7.11.21 – 7.11.21
Cisco / Cisco IOS XR Software24.2.20 – 24.2.20
Cisco / Cisco IOS XR Software24.3.2 – 24.3.2
Cisco / Cisco IOS XR Software24.4.10 – 24.4.10
Cisco / Cisco IOS XR Software6.5.35 – 6.5.35
Cisco / Cisco IOS XR Software25.1.1 – 25.1.1
Cisco / Cisco IOS XR Software24.4.2 – 24.4.2
Cisco / Cisco IOS XR Software24.3.20 – 24.3.20
Cisco / Cisco IOS XR Software24.4.15 – 24.4.15
Cisco / Cisco IOS XR Software25.2.1 – 25.2.1
Cisco / Cisco IOS XR Software6.5.351 – 6.5.351
Cisco / Cisco IOS XR Software25.1.2 – 25.1.2
Cisco / Cisco IOS XR Software24.3.30 – 24.3.30
Cisco / Cisco IOS XR Software25.3.1 – 25.3.1
Cisco / Cisco IOS XR Software6.5.352 – 6.5.352
Cisco / Cisco IOS XR Software24.4.30 – 24.4.30
Cisco / Cisco IOS XR Software24.2.21 – 24.2.21
Cisco / Cisco IOS XR Software25.4.1 – 25.4.1
Cisco / Cisco IOS XR Software25.2.2 – 25.2.2
Cisco / Cisco IOS XR Software25.2.15 – 25.2.15
Cisco / Cisco IOS XR Software7.2.0 – 7.2.0
Cisco / Cisco IOS XR Software7.0.0 – 7.0.0
Cisco / Cisco IOS XR Software25.2.30 – 25.2.30
Cisco / Cisco IOS XR Software6.5.353 – 6.5.353
Cisco / Cisco IOS XR Software25.1.30 – 25.1.30
Cisco / Cisco IOS XR Software25.3.15 – 25.3.15
Cisco / ios_xr25.2.21

References

VENDOR_ADVISORYhttps://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-privesc-bF8D5U4W

Updated 28m ago · 8 sources