Cisco CNC

Cisco CNC and NSO Flaw Allows Remote Attackers to Lock Down Network Management

Cisco NSO Denial of Service CVE-2026-20188

Cisco CNC and NSO Flaw Allows Remote Attackers to Lock Down Network Management

Do Son May 7, 2026

Cisco warns of a critical DoS flaw (CVE-2026-20188) in CNC and NSO. Unauthenticated attackers can freeze network management. Patch to CNC 7.2 or NSO 6.4.1.3 now!

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