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CVE-2025-20111— Cisco Nexus 3000 and 9000 Series Switches Layer 2 Ethernet Denial of Service Vulnerability

Quick assessment

Affected
Cisco Cisco NX-OS Software
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cisco Nexus 3000 Series Switches和Cisco Nexus 9000 Series Switches都是美国思科（Cisco）公司的产品。Cisco Nexus 3000 Series Switches是一款3000系列交换机。Cisco Nexus 9000 Series Switches是一款9000系列交换机。 Cisco Nexus 3000 Series Switches和Cisco Nexus 9000 Series Switches存在安全漏洞，该漏洞源于特定以

CVSS 7.4 · High EPSS 0.32% · P23
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I. Basic Information for CVE-2025-20111

Vulnerability Information
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Vulnerability Title
Cisco Nexus 3000 and 9000 Series Switches Layer 2 Ethernet Denial of Service Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the health monitoring diagnostics of Cisco Nexus 3000 Series Switches and Cisco Nexus 9000 Series Switches in standalone NX-OS mode could allow an unauthenticated, adjacent attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition. This vulnerability is due to the incorrect handling of specific Ethernet frames. An attacker could exploit this vulnerability by sending a sustained rate of crafted Ethernet frames to an affected device. A successful exploit could allow the attacker to cause the device to reload.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1220
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco Nexus 3000 Series Switches和Cisco Nexus 9000 Series Switches 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Nexus 3000 Series Switches和Cisco Nexus 9000 Series Switches都是美国思科（Cisco）公司的产品。Cisco Nexus 3000 Series Switches是一款3000系列交换机。Cisco Nexus 9000 Series Switches是一款9000系列交换机。 Cisco Nexus 3000 Series Switches和Cisco Nexus 9000 Series Switches存在安全漏洞，该漏洞源于特定以
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Cisco Cisco NX-OS Software 9.3(2) -

II. Public POCs for CVE-2025-20111

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III. Intelligence Information for CVE-2025-20111

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Vendor Advisories for CVE-2025-20111 (1)

Same Patch Batch · Cisco · 2025-02-26 · 6 CVEs total

CVE-2025-20119 6.0 MEDIUM Cisco Application Policy Infrastructure Controller Authenticated Local Denial of Service V
CVE-2025-20117 5.1 MEDIUM Cisco Application Policy Infrastructure Controller Authenticated Command Injection Vulnera
CVE-2025-20161 5.1 MEDIUM Cisco NX-OS Software Command Injection Vulnerability
CVE-2025-20116 4.8 MEDIUM Cisco Application Policy Infrastructure Controller Stored Cross-Site Scripting Vulnerabili
CVE-2025-20118 4.4 MEDIUM Cisco Application Policy Infrastructure Controller Authenticated Command Injection Due to

IV. Related Vulnerabilities

Same product: Cisco NX-OS Software
Same vendor: Cisco
Same weakness: CWE-1220

V. Comments for CVE-2025-20111

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