CVE-2026-76486
Cisco Nexus 3000 and 9000 Series Switches VXLAN OAM (NGOAM) Remote Code Execution Vulnerability
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.
Weakness: CWE-121
Affected products
| Vendor | Product | Category | Matched by |
|---|---|---|---|
| Cisco | Cisco NX-OS Software | Routing & Switching | cna-assigner |
Vendor-reported products (1)
- Cisco · Cisco NX-OS Software
Vendor advisory
Cisco Nexus 3000 and 9000 Series Switches NGOAM Remote Code Execution Vulnerabilities
Cisco’s rating: Critical (advisory CVSS 9.8) · Published Oct 7, 2026
Bug IDs: CSCwu19785 , CSCwu19823 , CSCwu57455
The vendor’s rating applies to the whole advisory and can differ from this CVE’s own CVSS severity. Where this comes from