CVE-2013-1659: VMware ESXi

High severity, CVSS 7.6. EPSS: 1.8% chance of exploitation in the next 30 days.

VMware vCenter Server 4.0 before Update 4b, 5.0 before Update 2, and 5.1 before 5.1.0b; VMware ESXi 3.5 through 5.1; and VMware ESX 3.5 through 4.1 do not properly implement the Network File Copy (NFC) protocol, which allows man-in-the-middle attackers to execute arbitrary code or cause a denial of service (memory corruption) by modifying the client-server data stream.

Affected products

• VMware ESXi: version 3.5 only; version 4.0 only; version 4.1 only; version 5.0 only; version 5.1 only
• VMware vCenter Server: version 4.0 only; version 5.0 only
• VMware vCenter Server Appliance: version 5.1 only; version 5.1.0a only

Published 2013-02-22. Last modified 2026-06-16.