PT-2026-21947 · Cisco · Cisco Nexus 9000 Series Fabric Switches

Publicado 2026-02-25 · Atualizado 2026-02-27 · CVE-2026-20033

Positive Technologies (AI Summary)

CVSS v3.1

7.4

Alta

Vetor base

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

Name of the Vulnerable Software and Affected Versions Cisco Nexus 9000 Series Fabric Switches versions (affected versions not specified)

Description A flaw exists in Cisco Nexus 9000 Series Fabric Switches operating in ACI mode that may allow a remote, unauthenticated attacker to disrupt service. The issue stems from inadequate validation of certain Ethernet frames. An attacker could leverage this by transmitting a specially crafted Ethernet frame to the management interface of a vulnerable device, potentially causing an unexpected reload and resulting in a denial of service (DoS) condition. Only the out-of-band (OOB) management interface is impacted.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Enumeração de Fraquezas

CWE-805

Identificadores relacionados

CVE-2026-20033

Produtos afetados

Cisco Nexus 9000 Series Fabric Switches

Referências · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-20033 · Nota de Segurança
• https://twitter.com/infoflowcloud/status/2027100403708334371 · Publicação no Twitter
• https://twitter.com/CVEnew/status/2027099318998688144 · Publicação no Twitter
• https://twitter.com/VulmonFeeds/status/2026798922438476143 · Publicação no Twitter
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-cpdos-qLsv6pFD · Aviso do Fabricante
• https://t.me/cveNotify/153487 · Publicação no Telegram