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Nexus 9000 Series Switches

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medium advisory

Cisco Nexus 3000 and 9000 Series Switches BGP Denial of Service Vulnerability

CVE-2026-20171 describes a vulnerability in the Border Gateway Protocol (BGP) enforce-first-as feature of Cisco Nexus 3000 and 9000 Series Switches that could allow an unauthenticated, remote attacker to trigger BGP peer flaps, resulting in a denial-of-service (DoS) condition.

Nexus 3000 Series Switches +1 bgp dos cisco network
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