CVE-2026-20033

HIGH EPSS 5.4%

Published Feb 25, 20264mo ago · Modified Apr 15, 20262mo ago

7.4 CVSS 3.1

High

Published Feb 25, 2026 4mo ago

Last Modified Apr 15, 2026 2mo ago

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.

CVSS Details

Base Score

7.4

Exploitability

2.8

Impact

4.0

Vector string

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

Attack Vector Adjacent

Attack Complexity Low

Privileges Required None

User Interaction None

Scope Changed

Confidentiality None

Integrity None

Availability High

Threat Intelligence

EPSS Exploit Probability

5.4% percentile

Exploit & Patch Status

No Known Exploit

No Patch Available

Weaknesses 1

CWE-805

References 1

sec.cloudapps.cisco.com https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-cpdos-qLsv6pFD

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.