CVE-2026-76471: Cisco NX-OS Software

Critical severity, CVSS 9.8. EPSS: 0.5% chance of exploitation in the next 30 days.

A vulnerability in the NX-API feature of Cisco NX-OS Software could allow an unauthenticated, remote attacker to execute arbitrary code with root privileges or cause a denial of service (DoS) condition on an affected device.  The vulnerability is due to insufficient input validation of data that is sent to the NX-API. An attacker could exploit this vulnerability by sending a crafted HTTP request to the NX-API of an affected device. A successful exploit could allow the attacker to execute arbitrary code with root privileges and could cause process crashes, which could result in a reload of the device and a DoS condition.

Affected products

• Cisco Cisco NX-OS Software: version 9.2(3) only; version 9.2(2v) only; version 9.2(1) only; version 9.2(2t) only; version 9.2(3y) only; version 9.3(2) only; …
• Cisco Cisco Unified Computing System Managed: version 4.0(1a) only; version 4.1(1d) only; version 4.0(4f) only; version 4.0(4a) only; version 4.0(4e) only; version 4.0(4c) only; …

Published 2026-10-07. Last modified 2026-10-08.