Main Vulnerability Database Vulnerabilities #VU123291

Buffer Access with Incorrect Length Value in Cisco UCS Manager and Cisco NX-OS - CVE-2026-20010

Published: February 26, 2026

Vulnerability identifier: #VU123291

CSH Severity:

CVSS v4: 0 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-20010

CWE-ID: CWE-805

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

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

The vulnerability exists due to a boundary error in the Link Layer Discovery Protocol (LLDP) feature. A remote attacker can send a specially crafted LLDP packet to an interface and perform a denial of service attack.

Affected software

Cisco UCS Manager
Cisco NX-OS

How to mitigate CVE-2026-20010

Install updates from vendor's website.

Cisco UCS Manager - update to 4.3(6e)
Cisco NX-OS - addressed in versions 10.3(5), 10.4(3), 16.0(9e)

External References

Related Security Bulletins