EN

CVE-2025-20111

High
7.4
0.05.010.0
Year
2025
Published
Feb 26, 2025
Known Affected Devices
0
CVSS Score
7.4

What is CVE-2025-20111?

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.

CVSS Vector Breakdown

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

Exploitable from an adjacent network (e.g. same LAN, Wi-Fi segment, Bluetooth).

AC
Attack Complexity
Low

No special conditions required. Exploit can be performed reliably and repeatedly.

PR
Privileges Required
None

No authentication required. Any anonymous user can exploit this vulnerability.

UI
User Interaction
None

No user interaction required. Exploit runs without any victim action.

S
Scope
Changed

Exploiting the vulnerability can affect other components beyond the vulnerable one.

C
Confidentiality Impact
None

No confidentiality impact. Sensitive data is not exposed.

I
Integrity Impact
None

No integrity impact. Data cannot be modified.

A
Availability Impact
High

Complete denial of service. The component becomes fully unavailable.

Known Affected Devices

Cisco Cisco ISR 4451 Cisco Cisco ISR 4461 Cisco Cisco ISR 927 Cisco Cisco ASR 1001-HX Cisco Cisco ASR 1002-X Cisco Cisco ASR 1002-HX Cisco Cisco ASR 1004 Cisco Cisco Catalyst 2960-24TC-L Cisco Cisco Catalyst 2960XR-48TS-I Cisco Cisco Catalyst 3560CX-8PC-S Cisco Cisco Catalyst 3650-24PS-L Cisco Cisco Catalyst 9200-24P Cisco Cisco Catalyst 9200-48T Cisco Cisco Catalyst 9200L-24P-4G Cisco Cisco Catalyst 9200L-24P-4X Cisco Cisco Catalyst 9300-24U Cisco Cisco Catalyst 9300L-48P-4G Cisco Cisco Catalyst 9300L-48T-4G Cisco Cisco Catalyst 9404R Cisco Cisco Catalyst 9500-12Q Cisco Cisco Catalyst 9500-16X Cisco Cisco Catalyst 9500-24Y4C Cisco Cisco Catalyst 9500-32C Cisco Cisco Catalyst 9500-40X Cisco Cisco Catalyst 9500-48Y4C Cisco Cisco Catalyst 9600-40YC Cisco Cisco Nexus 7004 Cisco Cisco Nexus 7010 Cisco Cisco Nexus 7018 Cisco Cisco Nexus 9364C Cisco Cisco Nexus 9372PX Cisco Cisco Nexus 9504 Cisco Cisco Nexus 9508 Cisco Cisco Catalyst 9115AXE Cisco Cisco Catalyst 9130AXE Cisco Cisco Catalyst 9800-40

FAQ

How severe is CVE-2025-20111?

CVE-2025-20111 has a CVSS score of 7.4/10, rated as High. This is a high severity vulnerability and should be patched as soon as possible.

What does the CVSS score mean for CVE-2025-20111?

CVSS (Common Vulnerability Scoring System) rates vulnerability severity from 0.0 to 10.0. CVE-2025-20111 scores 7.4/10 (High). Scores 9.0–10.0 are Critical, 7.0–8.9 are High, 4.0–6.9 are Medium, and below 4.0 are Low.

Which devices are affected by CVE-2025-20111?

The list of devices confirmed to be affected by CVE-2025-20111 is shown in the "Affected Devices" section above. Check your firmware version against the vendor security advisory and apply the latest patch.

How do I fix or mitigate CVE-2025-20111?

Apply the latest firmware or software update from the vendor. Check the References section above for official advisories and patch notes. If no patch is available, consider disabling the affected feature or isolating the device from untrusted networks.