IOS XR 6.9 vulnerabilities
2 advisories affect Cisco IOS XR 6.9. Latest: October 21, 2026.
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| Vulnerability | Severity | Affected versions |
|---|---|---|
| Cisco IOS XR Software for ASR 9000 Series Routers IPv4 Unicast Packets Denial of Service Vulnerability CVE-2026-76505 · October 21, 2026 | High 7.5 | 6.9.1; 6.9.2 |
| Cisco IOS XR Software Security Hardening Release: September 2026 CVE-2026-20274 +6 · September 17, 2026 | Critical 9.8 | 6.9.1; 6.9.2 |
Affected versions are compiled automatically from vendor advisories and NVD and may contain errors. Where no fixed version is shown, you will find it in the official advisory linked from every page: check it there before updating.
Other IOS XR versions: 24.4 · 24.3 · 24.2 · 24.1 · 7.11 · 7.10 · 7.9 · 7.8 · 7.7 · 7.6 · 7.5 · 7.4 · 7.3 · 7.1 · 7.0 · 6.8 · 6.7