CVE-2009-0627: Unspecified vulnerability in Cisco NX-OS before 4.0(1a)N2(1), when running on Nexus 5000 platforms, allows...

Security readout for executives and security teams

CVE-2009-0627 is a Cisco NX-OS denial-of-service issue affecting Nexus 5000 platforms before 4.0(1a)N2(1). A remote attacker could crash affected devices using an unspecified sequence of TCP packets. The public record does not describe data theft, code execution, or confirmed active exploitation. Exposure is most likely where Cisco Nexus 5000 switches run NX-OS earlier than 4.0(1a)N2(1), especially if reachable by untrusted TCP traffic. The provided structured affected-product data is incomplete, so confirm against Cisco's advisory and asset inventory. Treat this as a network availability risk. It can crash affected switching platforms, but public evidence in the bundle does not support emergency treatment for active exploitation. Prioritize remediation where Nexus 5000 devices support critical production traffic or are exposed to untrusted networks. Mitigation focus: Identify Nexus 5000 devices and their NX-OS versions.; Upgrade affected NX-OS systems to 4.0(1a)N2(1) or later where applicable.; Review Cisco's advisory for product-specific fixes and caveats..

Prepared

Jun 28, 2026, 10:26 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.