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TI-2025-14443 Aliases CVE-2025-20143GHSA-2w36-grgh-xprc

Cisco IOS XR Software Secure Boot Bypass Vulnerability

Priority LOW 30CWE-347Published · Updated

Key facts

Attack vector
Local
Privileges required
High
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-347.

Summary

A vulnerability in the boot process of Cisco IOS XR Software could allow an authenticated, local attacker with high privileges to bypass the Secure Boot functionality and load unverified software on an affected device. To exploit this vulnerability, the attacker must have root-system privileges on the affected device. This vulnerability is due to insufficient verification of modules in the software load process. An attacker could exploit this vulnerability by manipulating the loaded binaries to bypass some of the integrity checks that are performed during the booting process. A successful exploit could allow the attacker to control the boot configuration, which could enable them to bypass the requirement to run Cisco-signed images or alter the security properties of the running system. Note: This vulnerability affects Cisco IOS XR Software, not the Secure Boot feature. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00111 1st 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 Software6.5.3; 6.5.2; 6.5.92; 6.5.1; 6.5.15; 6.6.2; 7.0.1; 6.6.25; 6.6.1; 6.6.11; 6.5.93; 6.6.12; 7.0.0; 7.1.1; 7.0.90; 6.6.3; 6.7.1; 7.0.2; 7.1.15; 7.2.0; 7.2.1; 7.1.2; 6.7.2; 7.1.25; 6.6.4; 7.3.1; 7.1.3; 6.7.3; 7.4.1; 7.2.2; 6.8.1; 7.4.15; 7.3.2; 7.5.1; 7.4.16; 7.3.27; 7.6.1; 7.5.2; 7.6.15; 7.3.3; 7.7.1; 6.8.2; 7.4.2; 7.3.4; 6.7.35; 6.9.1; 7.6.2; 7.8.1; 7.5.3; 7.7.2; 6.9.2; 7.8.2; 7.5.4; 7.8.22; 7.7.21; 7.3.5; 7.5.5; 7.3.6; 7.8.23—No fix listedCNA
  • Cisco IOS XR Software VendorCisco Affected 6.5.3; 6.5.2; 6.5.92; 6.5.1; 6.5.15; 6.6.2; 7.0.1; 6.6.25; 6.6.1; 6.6.11; 6.5.93; 6.6.12; 7.0.0; 7.1.1; 7.0.90; 6.6.3; 6.7.1; 7.0.2; 7.1.15; 7.2.0; 7.2.1; 7.1.2; 6.7.2; 7.1.25; 6.6.4; 7.3.1; 7.1.3; 6.7.3; 7.4.1; 7.2.2; 6.8.1; 7.4.15; 7.3.2; 7.5.1; 7.4.16; 7.3.27; 7.6.1; 7.5.2; 7.6.15; 7.3.3; 7.7.1; 6.8.2; 7.4.2; 7.3.4; 6.7.35; 6.9.1; 7.6.2; 7.8.1; 7.5.3; 7.7.2; 6.9.2; 7.8.2; 7.5.4; 7.8.22; 7.7.21; 7.3.5; 7.5.5; 7.3.6; 7.8.23 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:*before 7.9.1VulnerableCisco
  • cpe:2.3:o:cisco:ios_xr:*:*:*:*:*:*:*:* Versions before 7.9.1 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-20143
  2. 2026-10-03 Alias added: GHSA-2w36-grgh-xprc

References

Advisory 1

Other 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