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CVE-2026-20033

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CVE-2026-20033

Published: Feb 25, 2026

Modified: Feb 25, 2026

PUBLISHED

CVSS v3.1

7.4

HIGH

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.

VendorProductVersions

Cisco

Cisco NX-OS System Software in ACI Mode

affected
15.2(1g)
affected
15.2(2e)
affected
15.2(2f)
affected
15.2(2g)
affected
15.2(2h)

+52 more versions

Weaknesses (CWE)

CWE-805

CVSS v3.1 Details

CVSS v3.1 Vector

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

References

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