#VU123290 Buffer Access with Incorrect Length Value in Cisco NX-OS - CVE-2026-20033

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Main Vulnerability Database Vulnerabilities #VU123290

#VU123290 Buffer Access with Incorrect Length Value in Cisco NX-OS - CVE-2026-20033

Published: February 26, 2026


Vulnerability identifier: #VU123290
Vulnerability risk: Low
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:Clear
CVE-ID: CVE-2026-20033
CWE-ID: CWE-805
Exploitation vector: Adjecent network
Exploit availability: No public exploit available
Vulnerable software:
Cisco NX-OS
Software vendor:
Cisco Systems, Inc

Description

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

The vulnerability exists due to improper input validation when processing specific Ethernet frames. A remote attacker on the local network can send specially crafted data to the out-of-band (OOB) management interface of an affected device and perform a denial of service attack.


Remediation

Install updates from vendor's website.

External links