---
id: CVE-2026-76501
title: >-
  A vulnerability in the Segment Routing over IPv6 (SRv6) 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…
summary: >-
  A vulnerability in the Segment Routing over IPv6 (SRv6) 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…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-121
vendor: Cisco
product: Cisco NX-OS Software
affected:
  - nx-os_software 9.3(3)
  - nx-os_software 9.3(4)
  - nx-os_software 9.3(5)
  - nx-os_software 9.3(6)
  - nx-os_software 9.3(5w)
  - nx-os_software 9.3(7)
  - nx-os_software 9.3(7k)
  - nx-os_software 9.3(7a)
  - nx-os_software 9.3(8)
  - nx-os_software 9.3(9)
  - nx-os_software 9.3(10)
  - nx-os_software 10.3(1)
  - nx-os_software 10.3(2)
  - nx-os_software 9.3(11)
  - nx-os_software 10.3(3)
  - nx-os_software 9.3(12)
  - nx-os_software 10.4(1)
  - nx-os_software 10.3(99w)
  - nx-os_software 10.3(3w)
  - nx-os_software 10.3(99x)
  - nx-os_software 10.3(3o)
  - nx-os_software 10.3(4)
  - nx-os_software 10.3(3p)
  - nx-os_software 10.3(4a)
  - nx-os_software 10.4(2)
  - nx-os_software 10.3(3q)
  - nx-os_software 9.3(13)
  - nx-os_software 10.3(5)
  - nx-os_software 10.4(3)
  - nx-os_software 10.3(3x)
  - nx-os_software 10.3(4g)
  - nx-os_software 10.5(1)
  - nx-os_software 10.3(3r)
  - nx-os_software 10.3(6)
  - nx-os_software 9.3(14)
  - nx-os_software 10.4(4)
  - nx-os_software 10.3(4h)
  - nx-os_software 10.5(2)
  - nx-os_software 10.3(7)
  - nx-os_software 10.4(5)
  - nx-os_software 10.5(3)
  - nx-os_software 9.3(15)
  - nx-os_software 10.4(4g)
  - nx-os_software 10.5(4)
  - nx-os_software 10.6(1)
  - nx-os_software 10.5(3t)
  - nx-os_software 10.3(8)
  - nx-os_software 10.4(6)
  - nx-os_software 10.5(3s)
  - nx-os_software 10.5(3e)
published: '2026-10-07'
updated: '2026-10-07'
sourceUpdated: '2026-10-07T17:17:02.113'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-76501'
references:
  - url: >-
      https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ngoam-rce-LWKQ4BU
    label: psirt@cisco.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-10-07T16:41:29.309585Z'
ingestedAt: '2026-10-07T16:38:22.244Z'
---

## Overview

A vulnerability in the Segment Routing over IPv6 (SRv6) 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 and SRv6 features are 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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.