Cisco IOS XR Software Security Hardening Release: September 2026 (Cisco Cisco IOS XR Software)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.53 % · percentile 45 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- cisco
- NVD status
- Analyzed
Description
As part of Cisco's ongoing commitment to proactive security and product quality, the Cisco IOS XR Software engineering team has conducted a comprehensive internal security review. This review resulted in a software hardening releases that address multiple internally discovered vulnerabilities. The vulnerabilities tracked by CVE-2026-20274 are related to improper resource control issues that are grouped under the Common Weakness Enumeration (CWE) CWE-664.
Weaknesses (CWE)
- CWE-664 — Improper Control of a Resource Through its Lifetime
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | CRITICAL 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | cisco |
| CVSS 3.1 | CRITICAL 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | NVD · psirt@cisco.com (Secondary) |
European references
- ENISA EUVD · EUVD-2026-70204
- GCVE · GCVE-0-2026-20274
CERT-FR advisories
- CERTFR-2026-AVI-1110 — Multiples vulnérabilités dans les produits Cisco · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:cisco:ios_xr:6.5.25:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.5.26:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.5.28:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.5.29:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.5.31:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.5.32:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.5.33:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.5.35:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.5.90:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.5.351:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.5.352:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.5.353:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.7.1:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.7.2:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.7.3:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.7.4:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.7.35:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.8.1:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.8.2:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.9.1:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:6.9.2:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:7.0.0:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:7.0.1:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:7.0.2:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:7.0.11:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:7.0.12:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:7.0.14:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:7.0.90:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:7.1.1:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:7.1.2:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:7.1.3:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:7.1.15:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:7.1.25:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:7.2.0:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:7.2.1:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:7.2.2:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:7.2.12:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:7.3.1:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:7.3.2:*:*:*:*:*:*:*cpe:2.3:o:cisco:ios_xr:7.3.3:*:*:*:*:*:*:*- +71 more
Affected products
| Product | Versions |
|---|---|
| Cisco · Cisco IOS XR Software | affected 6.5.29 ; affected 7.0.1 ; affected 6.5.26 ; affected 6.5.25 ; affected 6.5.28 ; affected 6.5.90 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |