CVE-2026-76465 PUBLISHED

Cisco Nexus 3000 and 9000 Series Switches MPLS OAM Remote Code Execution Vulnerability

Assigner: cisco
Reserved: 19.08.2026 Published: 07.10.2026 Updated: 08.10.2026

A vulnerability in the MPLS Operation, Administration, and Maintenance (OAM) feature of Cisco NX-OS Software for Cisco Nexus 3000 Series Switches and Cisco Nexus 9000 Series Switches could allow an unauthenticated, remote attacker to execute arbitrary code with root privileges or cause a denial of service (DoS) condition on an affected device.

This vulnerability is due to improper validation when an affected device is processing an MPLS echo-request packet. An attacker could exploit this vulnerability by sending a crafted MPLS echo-request to an IP address on an affected device. A successful exploit could allow the attacker to execute arbitrary code with root privileges and could cause process crashes, which could result in a device reload and a DoS condition.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 9.8

Product Status

Vendor Cisco
Product Cisco NX-OS Software
Versions Default: unknown
  • Version 9.3(2) is affected
  • Version 9.3(1) is affected
  • Version 9.3(1z) is affected
  • Version 9.3(3) is affected
  • Version 9.3(4) is affected
  • Version 9.3(5) is affected
  • Version 9.3(6) is affected
  • Version 9.3(5w) is affected
  • Version 9.3(7) is affected
  • Version 9.3(7k) is affected
  • Version 9.3(7a) is affected
  • Version 9.3(8) is affected
  • Version 9.3(9) is affected
  • Version 9.3(10) is affected
  • Version 10.3(1) is affected
  • Version 10.3(2) is affected
  • Version 9.3(11) is affected
  • Version 10.3(3) is affected
  • Version 9.3(12) is affected
  • Version 10.4(1) is affected
  • Version 10.3(99w) is affected
  • Version 10.3(3w) is affected
  • Version 10.3(99x) is affected
  • Version 10.3(3o) is affected
  • Version 10.3(4) is affected
  • Version 10.3(3p) is affected
  • Version 10.3(4a) is affected
  • Version 10.4(2) is affected
  • Version 10.3(3q) is affected
  • Version 9.3(13) is affected
  • Version 10.3(5) is affected
  • Version 10.4(3) is affected
  • Version 10.3(3x) is affected
  • Version 10.3(4g) is affected
  • Version 10.5(1) is affected
  • Version 10.3(3r) is affected
  • Version 10.3(6) is affected
  • Version 9.3(14) is affected
  • Version 10.4(4) is affected
  • Version 10.3(4h) is affected
  • Version 10.5(2) is affected
  • Version 10.3(7) is affected
  • Version 10.4(5) is affected
  • Version 10.5(3) is affected
  • Version 9.3(15) is affected
  • Version 10.4(4g) is affected
  • Version 10.5(4) is affected
  • Version 10.6(1) is affected
  • Version 10.5(3t) is affected
  • Version 10.3(8) is affected
  • Version 10.4(6) is affected
  • Version 10.5(3s) is affected
  • Version 10.5(3e) is affected
  • Version 10.5(3o) is affected
  • Version 9.3(16) is affected
  • Version 10.6(1s) is affected
  • Version 10.6(2) is affected
  • Version 10.5(3p) is affected
  • Version 10.3(9) is affected
  • Version 10.6(2s) is affected
  • Version 10.6(3) is affected
  • Version 10.4(7) is affected
  • Version 10.5(5) is affected
  • Version 9.3(17) is affected
  • Version 10.6(2n) is affected
  • Version 10.6(3s) is affected

Exploits

The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.

References

Problem Types

  • Free of Memory not on the Heap cwe