Posting Date: 2026/10/15

【Vulnerability Alert】Cisco NX-OS Software NX-API has a critical security vulnerability (CVE-2026-76471)

  • Subject: 【Vulnerability Alert】Cisco NX-OS Software NX-API has a critical security vulnerability (CVE-2026-76471)


  • Description:
    • Forwarding TWCERTCC Security Information Advisory TWCERTCC-200-202610-00000020
    • Cisco has released a critical security vulnerability advisory for NX-OS Software NX-API (CVE-2026-76471, CVSS: 9.8). This vulnerability may allow an unauthenticated remote attacker to execute code with root privileges or cause a DoS attack on affected devices.
  • Affected Platforms:
    • UCS 6300 Series Fabric Interconnect Cisco UCS Software versions 4.2 (inclusive) and earlier, UCS 6300 Series Fabric Interconnect Cisco UCS Software version 4.3
  • Recommended Actions:
    • Please update to UCS 6300 Series Fabric Interconnect Cisco UCS Software version 4.3(6j) (inclusive) or later
  • References:
    1. https://www.twcert.org.tw/tw/cp-169-11284-1c474-1.html

Computer and Communication Center
Network System Division