8.8
High
CVE-2026-20040 A vulnerability in the CLI of Cisco IOS XR Software could allow an authenticated, local attacker to execute arbitrary…
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Cisco IOS XR Software | 25.4.1 | No fix stated |
| Cisco IOS XR Software 25.3 | 25.3.1 → 25.3.15 | No fix stated |
| Cisco IOS XR Software 25.2 | 25.2.1 → 25.2.30 | No fix stated |
| Cisco IOS XR Software 25.1 | 25.1.1 → 25.1.30 | No fix stated |
| Cisco IOS XR Software 24.4 | 24.4.1 → 24.4.30 | No fix stated |
| Cisco IOS XR Software 24.3 | 24.3.1 → 24.3.30 | No fix stated |
| Cisco IOS XR Software 24.2 | 24.2.1 → 24.2.21 | No fix stated |
| Cisco IOS XR Software 24.1 | 24.1.1 → 24.1.2 | No fix stated |
| Cisco IOS XR Software 7.11 | 7.11.1 → 7.11.21 | No fix stated |
Show the 16 other branches Hide the 16 other branches
| Product | Affected versions | Fixed in |
|---|---|---|
| Cisco IOS XR Software 7.10 | 7.10.1 → 7.10.2 | No fix stated |
| Cisco IOS XR Software 7.9 | 7.9.1 → 7.9.21 | No fix stated |
| Cisco IOS XR Software 7.8 | 7.8.1 → 7.8.23 | No fix stated |
| Cisco IOS XR Software 7.7 | 7.7.1 → 7.7.21 | No fix stated |
| Cisco IOS XR Software 7.6 | 7.6.1 → 7.6.15 | No fix stated |
| Cisco IOS XR Software 7.5 | 7.5.1 → 7.5.52 | No fix stated |
| Cisco IOS XR Software 7.4 | 7.4.1 → 7.4.16 | No fix stated |
| Cisco IOS XR Software 7.3 | 7.3.1 → 7.3.27 | No fix stated |
| Cisco IOS XR Software 7.2 | 7.2.0 → 7.2.12 | No fix stated |
| Cisco IOS XR Software 7.1 | 7.1.1 → 7.1.25 | No fix stated |
| Cisco IOS XR Software 7.0 | 7.0.0 → 7.0.90 | No fix stated |
| Cisco IOS XR Software 6.9 | 6.9.1 → 6.9.2 | No fix stated |
| Cisco IOS XR Software 6.8 | 6.8.1 → 6.8.2 | No fix stated |
| Cisco IOS XR Software 6.7 | 6.7.1 → 6.7.35 | No fix stated |
| Cisco IOS XR Software 6.6 | 6.6.1 → 6.6.25 | No fix stated |
| Cisco IOS XR Software 6.5 | 6.5.1 → 6.5.353 | No fix stated |
References
- cisco-sa-iosxr-privesc-bF8D5U4W sec.cloudapps.cisco.com
Timeline
- Published
- Last modified
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