# CVE-2026-76465 — Cisco NX-OS Software

> As of 2026-10-08, CVE-2026-76465 is a CRITICAL-severity vulnerability in Cisco NX-OS Software, CVSS v3.1 9.8, EPSS 0.4% (37.0th percentile). Threadlinqs Intelligence links 2 tracked threat campaigns to CVE-2026-76465, most recently “Cisco Nexus 3000/9000 NX-OS and Cisco License (Smart Software Manager On-Prem) critical flaws enabling switch takeover (CVE-2026-76471, CVE-2026-76480, CVE-2026-76482 and others)”.

**Last updated:** 2026-10-08

## What is CVE-2026-76465?

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.

The record classifies CVE-2026-76465 under weakness class [CWE-590](https://cwe.mitre.org/data/definitions/590.html). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 3 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 9.8 — CRITICAL (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **EPSS (FIRST):** 0.4% probability of exploitation in the next 30 days, higher than 37.0% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 6.4/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-10-07, last modified 2026-10-08

## Is CVE-2026-76465 being exploited?

It currently carries a trending score of 49 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [Cisco](https://intel.threadlinqs.com/vendors/cisco): NX-OS Software

## How to fix CVE-2026-76465

No vendor patch reference has been recorded for CVE-2026-76465 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-76465

2 tracked threats in the Threadlinqs corpus reference CVE-2026-76465, either in the campaign’s CVE list or as an indicator on the campaign record.

- [Cisco Nexus 3000/9000 NX-OS and Cisco License (Smart Software Manager On-Prem) critical flaws enabling switch takeover (CVE-2026-76471, CVE-2026-76480, CVE-2026-76482 and others)](https://intel.threadlinqs.com/threat/TL-2026-3082) — CRITICAL · 2026-10-09
- [Cisco October 2026 Security Advisories: Critical Flaws in Meraki, License (SSM) On-Prem, NX-OS, APIC and Finesse (CVE-2026-76464, CVE-2026-20328, CVE-2026-76485 and others)](https://intel.threadlinqs.com/threat/TL-2026-3108) — CRITICAL · 2026-10-09

## Sources

Enriched from CVE.org, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-10-10.

**Other references**

- [sec.cloudapps.cisco.com](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-moam-rce-uBTzYV7)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-76465
Full detection coverage and IOCs for threats exploiting CVE-2026-76465 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp