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VULNERABILITIES

CVE-2026-20033 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

Description

A vulnerability in Cisco Nexus 9000 Series Fabric Switches in ACI mode could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient validation when processing specific Ethernet frames. An attacker could exploit this vulnerability by sending a crafted Ethernet frame to the management interface of an affected device. A successful exploit could allow the attacker to cause the device to reload unexpectedly, resulting in a DoS condition. Note: Only the out-of-band (OOB) management interface is affected.

Metrics

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-cpdos-qLsv6pFD [email protected]AdvisoryRemedyVendor

Weakness Enumeration

CWE-IDCWE NameSource
CWE-805Buffer Access with Incorrect Length Value[email protected]

Affected Products

ProductVersions
Cisco Nexus 9000
All versions

CPE

  • cpe:2.3:o:cisco:nexus_9000_firmware:*:*:*:*:*:*:*:*
  • cpe:2.3:h:cisco:nexus_9000:*:*:*:*:*:*:*:*

Remediation

  • Upgrade: >= 17.3.1, < 17.3.2moderate effort
  • Upgrade: >= 17.2.1, < 17.2.2moderate effort
  • Upgrade: >= 16.9.1, < 16.9.2moderate effort
  • Upgrade: >= 16.6.1, < 16.6.2moderate effort
  • Upgrade: >= 16.5.1, < 16.5.2moderate effort
  • Upgrade: >= 16.4.1, < 16.4.2moderate effort
  • Upgrade: >= 16.3.1, < 16.3.2moderate effort
  • Upgrade: >= 16.2.1, < 16.2.2moderate effort
  • Upgrade: >= 16.1.1, < 16.1.2moderate effort
  • Upgrade: >= 15.9.1, < 15.9.2moderate effort
  • Upgrade: >= 15.8.1, < 15.8.2moderate effort
  • Upgrade: >= 15.7.1, < 15.7.2moderate effort
  • Upgrade: >= 15.6.1, < 15.6.2moderate effort
  • Upgrade: >= 15.5.1, < 15.5.2moderate effort
  • Upgrade: >= 15.4.1, < 15.4.2moderate effort
  • Upgrade: >= 15.3.1, < 15.3.2moderate effort
  • Upgrade: >= 15.2.1, < 15.2.2moderate effort
  • Upgrade: >= 15.1.1, < 15.1.2moderate effort
  • Upgrade: >= 14.2.1, < 14.2.2moderate effort
  • Upgrade: >= 14.1.1, < 14.1.2moderate effort
  • Upgrade: >= 13.2.1, < 13.2.2moderate effort
  • Upgrade: >= 13.1.1, < 13.1.2moderate effort
  • Upgrade: >= 12.2.1, < 12.2.2moderate effort
  • Upgrade: >= 12.1.1, < 12.1.2moderate effort

Change History

3 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-20033
NVD Published Date:
Feb 25, 2026
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2026-20033 Details - Not Deferred