[ CVE-2026-76486 · Published 7 Oct 2026 ]
Vulnerability in Cisco NX-OS Software
[ Why it matters ]Priority signals
- Critical severity: CVSS 9.8
[ Description ]Official description
A vulnerability in the VXLAN Operation, Administration, and Maintenance (OAM) feature of Cisco NX-OS Software, known as NGOAM, could allow an unauthenticated, remote attacker to execute arbitrary code with root privileges or cause a Denial-of-Service (DoS) on an affected device. This vulnerability is due to improper input validation of IP traffic when the NGOAM feature is enabled. An attacker could exploit this vulnerability by sending crafted packets to an IP interface on an affected device. A successful exploit could allow the attacker to execute arbitrary code with root privileges and could cause process crashes resulting in a reload and DoS condition.
[ Fixes ]Fixes and patches
No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.
[ Advisories ]Government CERT advisories
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CERT-FRCERTFR-2026-AVI-1282
Multiple vulnerabilities in Cisco products Translated from French
Multiple vulnerabilities have been discovered in Cisco products. Some of them allow an attacker to cause remote arbitrary code execution, privilege escalation and remote denial of service.
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BSI CERT-BundWID-SEC-2026-3810
Cisco Nexus and Cisco NX-OS: Multiple vulnerabilities Translated from German