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TI-2026-16260 Aliases CVE-2026-20046GHSA-jmg4-jjq9-vcrv

Cisco IOS XR Software CLI Privilege Escalation Vulnerability

Priority LOW 39CWE-264Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-264.

Summary

A vulnerability in task group assignment for a specific CLI command in Cisco IOS XR Software could allow an authenticated, local attacker to elevate privileges and gain full administrative control of an affected device. This vulnerability is due to incorrect mapping of a command to task groups within the source code. An attacker with a low-privileged account could exploit this vulnerability by using the CLI command to bypass the task group–based checks. A successful exploit could allow the attacker to elevate privileges and perform actions on an affected device without authorization checks.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00154 4th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
CiscoCisco IOS XR Software6.6.1; 6.5.3; 7.0.1; 6.5.1; 6.5.2; 6.6.2; 6.6.25; 7.1.1; 7.0.90; 6.6.3; 7.0.2; 7.1.2; 7.2.1; 6.6.4; 7.3.1; 7.4.1; 7.2.2; 7.3.2; 7.5.1; 7.6.1; 7.5.2; 7.3.4; 7.3.3; 7.4.2; 7.7.1; 7.6.2; 7.8.1; 7.7.2; 7.9.1; 7.8.2; 7.5.4; 7.8.22; 7.10.1; 7.7.21; 7.9.2; 7.5.5; 7.11.1; 7.10.2; 7.3.6; 24.1.1; 7.11.2; 24.2.1; 24.1.2; 24.3.1; 24.4.1; 24.2.2; 7.11.21; 24.2.20; 24.3.2; 24.4.2; 25.1.1; 24.3.20; 25.2.1; 25.1.2; 24.3.30; 24.2.21; 25.1.30—No fix listedCNA
  • Cisco IOS XR Software VendorCisco Affected 6.6.1; 6.5.3; 7.0.1; 6.5.1; 6.5.2; 6.6.2; 6.6.25; 7.1.1; 7.0.90; 6.6.3; 7.0.2; 7.1.2; 7.2.1; 6.6.4; 7.3.1; 7.4.1; 7.2.2; 7.3.2; 7.5.1; 7.6.1; 7.5.2; 7.3.4; 7.3.3; 7.4.2; 7.7.1; 7.6.2; 7.8.1; 7.7.2; 7.9.1; 7.8.2; 7.5.4; 7.8.22; 7.10.1; 7.7.21; 7.9.2; 7.5.5; 7.11.1; 7.10.2; 7.3.6; 24.1.1; 7.11.2; 24.2.1; 24.1.2; 24.3.1; 24.4.1; 24.2.2; 7.11.21; 24.2.20; 24.3.2; 24.4.2; 25.1.1; 24.3.20; 25.2.1; 25.1.2; 24.3.30; 24.2.21; 25.1.30 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*before 25.2.2VulnerableCisco
cpe:2.3:h:cisco:ios_xrv_9000:-:*:*:*:*:*:*:*not specified by NVDRunning onCisco
  • cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* Versions before 25.2.2 Vulnerable ·Cisco
  • cpe:2.3:h:cisco:ios_xrv_9000:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-20046
  2. 2026-10-03 Alias added: GHSA-jmg4-jjq9-vcrv

References

Advisory 1

  • TI-2020-02680 Cisco IOS XR Software Cisco Discovery Protocol Format String Vulnerability KEVCVSS 3.1HIGH 8.8
  • TI-2018-00135 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.8
  • TI-2020-03113 Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerabilities KEVCVSS 3.1HIGH 8.6
  • TI-2020-03110 Cisco IOS XR Software DVMRP Memory Exhaustion Vulnerability KEVCVSS 3.1HIGH 8.6
  • TI-2018-00142 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.0
  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
See all 199 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences