Cisco NX-OS Flaw Allows Remote Unauthenticated DoS
Cisco disclosed CVE-2026-20173, a medium-severity vulnerability in NX-OS Software where rate limiting was improperly applied to some protocols. An unauthenticated remote attacker can send high rates of UDP or TCP connections to a data plane interface, exhausting resources and disrupting routing and control plane protocols. Cisco released software updates; no workarounds exist.
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