#VU105095 Input validation error in Cisco Systems, Inc products - CVE-2025-20111

Vulnerability identifier: #VU105095

Vulnerability risk: Medium

CVSSv4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

CVE-ID: CVE-2025-20111

CWE-ID: CWE-20

Exploitation vector: Adjecent network

Exploit availability: No public exploit available

Vulnerable software:
Cisco NX-OS
Nexus 3100 Series Switches
Nexus 3200 Series Switches
Nexus 3400 Series Switches
Nexus 3600 Series Switches
Nexus 9200 Series Switches in standalone NX-OS mode
Nexus 9300 Series Switches in standalone NX-OS mode
Nexus 9400 Series Switches in standalone NX-OS mode

Software vendor:
Cisco Systems, Inc

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to the incorrect handling of specific Ethernet frames in the health monitoring diagnostics. A remote attacker on the local network can send a sustained rate of crafted Ethernet frames and perform a denial of service (DoS) attack.

Install updates from vendor's website.

• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-n3kn9k-healthdos-eOqSWK4g