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CVE-2026-76505 is a high-severity vulnerability in Cisco IOS XR Software affecting specific Cisco ASR 9000 and 9900 Series routers. It involves improper input validation in the IPv4 packet processing path, allowing an unauthenticated remote attacker to cause network processor errors. This can lead to line card resets or shutdowns, resulting in denial of service (DoS). The vulnerability does not affect transit IPv4 traffic or IPv6 traffic. Multiple specific software versions are affected. Join the discussion | CVE Database V5 | 10/21/2026, 16:18:12 UTC Added: 10/21/2026, 16:31:19 UTC |
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