---
title: "CVE-2026-76458: Cisco NX-OS - Denial of Service"
description: "Cisco NX-OS contains improper handling of exceptional conditions (CWE-703) causing multiple vulnerabilities, letting attackers potentially cause denial of service or other impacts, exploit requires network access."
url: https://panop.io/threat-heartbeat/CVE-2026-76458/
---

# CVE-2026-76458 Cisco NX-OS - Denial of Service

Cisco NX-OS contains improper handling of exceptional conditions (CWE-703) causing multiple vulnerabilities, letting attackers potentially cause denial of service or other impacts, exploit requires network access.

CVSS base score 8.6 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.28% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-76458)

## Details

Type

Denial of Service

Impact

Denial Of Service

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Published

7 October 2026

Updated

15 October 2026

Weakness

[CWE-703](https://cwe.mitre.org/data/definitions/703.html)

## Vendor fix

Update to the latest Cisco NX-OS software hardening release.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-76458](https://nvd.nist.gov/vuln/detail/CVE-2026-76458)
- [https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-nxosw1-cWzSbtR](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-hardening-nxosw1-cWzSbtR)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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