【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

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