Cisco IOS XR vulnerabilities

2 advisories, 0 actively exploited. Last update: October 21, 2026.

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CVE-2026-76505October 21, 2026High 7.5
Cisco IOS XR Software for ASR 9000 Series Routers IPv4 Unicast Packets Denial of Service Vulnerability
CVE-2026-20274 +6September 17, 2026Critical 9.8
Cisco IOS XR Software Security Hardening Release: September 2026