CVE-2015-6393: Cisco NX-OS

High severity, CVSS 7.5. EPSS: 2.8% chance of exploitation in the next 30 days.

Cisco NX-OS 4.1 through 7.3 and 11.0 through 11.2 on Nexus 2000, 3000, 3500, 5000, 5500, 5600, 6000, 7000, 7700, and 9000 devices allows remote attackers to cause a denial of service (device crash) via malformed IPv4 DHCP packets to the DHCPv4 relay agent, aka Bug IDs CSCuq39250, CSCus21733, CSCus21739, CSCut76171, and CSCux67182.

Affected products

• Cisco NX-OS: version 4.2(1)n1(1) only; version 4.2(1)n2(1) only; version 4.2(1)n2(1a) only; version 5.0(2)n1(1) only; version 5.0(2)n2(1) only; version 5.0(2)n2(1a) only; …

Published 2016-10-06. Last modified 2026-06-17.