All vulnerabilities
CVE-2026-76486

Cisco Nexus 3000 and 9000 Series Switches VXLAN OAM (NGOAM) Remote Code Execution Vulnerability

Cisco Cisco NX-OS SoftwareNetwork & edge
Open in ThreatlineRecord JSON
CVSS
9.8Critical
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.51%Chance of exploitation activity in the next 30 days, higher than 42% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Published7 Oct 2026Updated 8 Oct 2026CVE List

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

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.

Text from CVE List

Affected versions 30

  • Cisco NX-OS Softwareaffected: 9.3(3)CVE List
  • Cisco NX-OS Softwareaffected: 9.3(4)CVE List
  • Cisco NX-OS Softwareaffected: 9.3(5)CVE List
  • Cisco NX-OS Softwareaffected: 9.3(6)CVE List
  • Cisco NX-OS Softwareaffected: 9.3(5w)CVE List
  • Cisco NX-OS Softwareaffected: 9.3(7)CVE List
  • Cisco NX-OS Softwareaffected: 9.3(7k)CVE List
  • Cisco NX-OS Softwareaffected: 9.3(7a)CVE List
  • Cisco NX-OS Softwareaffected: 9.3(8)CVE List
  • Cisco NX-OS Softwareaffected: 9.3(9)CVE List
  • Cisco NX-OS Softwareaffected: 9.3(10)CVE List
  • Cisco NX-OS Softwareaffected: 10.3(1)CVE List
  • Cisco NX-OS Softwareaffected: 10.3(2)CVE List
  • Cisco NX-OS Softwareaffected: 9.3(11)CVE List
  • Cisco NX-OS Softwareaffected: 10.3(3)CVE List
  • Cisco NX-OS Softwareaffected: 9.3(12)CVE List
  • Cisco NX-OS Softwareaffected: 10.4(1)CVE List
  • Cisco NX-OS Softwareaffected: 10.3(99w)CVE List
  • Cisco NX-OS Softwareaffected: 10.3(3w)CVE List
  • Cisco NX-OS Softwareaffected: 10.3(99x)CVE List
  • Cisco NX-OS Softwareaffected: 10.3(3o)CVE List
  • Cisco NX-OS Softwareaffected: 10.3(4)CVE List
  • Cisco NX-OS Softwareaffected: 10.3(3p)CVE List
  • Cisco NX-OS Softwareaffected: 10.3(4a)CVE List
  • Cisco NX-OS Softwareaffected: 10.4(2)CVE List
  • Cisco NX-OS Softwareaffected: 10.3(3q)CVE List
  • Cisco NX-OS Softwareaffected: 9.3(13)CVE List
  • Cisco NX-OS Softwareaffected: 10.3(5)CVE List
  • Cisco NX-OS Softwareaffected: 10.4(3)CVE List
  • Cisco NX-OS Softwareaffected: 10.3(3x)CVE List

References 1