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.

No CVSS v4.0

Attack Vector Adjacent Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Cisco Cisco NX-OS System Software in ACI Mode unknown
Version Status Constraints
15.2(1g) affected —
15.2(2e) affected —
15.2(2f) affected —
15.2(2g) affected —
15.2(2h) affected —
15.2(3f) affected —
15.2(3e) affected —
15.2(3g) affected —
15.2(4d) affected —
15.2(4e) affected —
15.2(5c) affected —
15.2(5d) affected —
16.0(1g) affected —
15.2(5e) affected —
15.2(4f) affected —
15.2(6e) affected —
15.2(6h) affected —
16.0(1j) affected —
15.2(6g) affected —
15.2(7f) affected —
15.2(7g) affected —
16.0(2h) affected —
15.2(8d) affected —
16.0(2j) affected —
15.2(8e) affected —
16.0(3d) affected —
16.0(3e) affected —
15.2(8f) affected —
15.2(8g) affected —
15.3(1d) affected —
15.2(8h) affected —
16.0(4c) affected —
15.3(2a) affected —
15.2(8i) affected —
16.0(5h) affected —
15.3(2b) affected —
16.0(3g) affected —
16.0(5j) affected —
15.3(2c) affected —
16.0(6c) affected —
15.3(2d) affected —
16.1(1f) affected —
16.0(7e) affected —
16.0(8e) affected —
15.3(2e) affected —
16.0(8f) affected —
16.1(2f) affected —
16.1(2g) affected —
15.3(2f) affected —
16.0(9c) affected —
16.1(3f) affected —
16.0(9d) affected —
16.0(6h) affected —
16.0(8h) affected —
16.1(3g) affected —
16.0(9e) affected —
16.1(4h) affected —

No data.

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Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-cpdos-qLsv6pFD cve-icon cve-icon
History

Wed, 25 Feb 2026 17:15:00 +0000

Type Values Removed Values Added
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.
Title Cisco NX-OS Software Denial of Service Vulnerability
Weaknesses CWE-805
References
Metrics cvssV3_1

{'score': 7.4, 'vector': 'CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2026-02-25T16:26:29.215Z

Reserved: 2025-10-08T11:59:15.353Z

Link: CVE-2026-20033

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-02-25T17:25:24.560

Modified: 2026-02-25T17:25:24.560

Link: CVE-2026-20033

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses