SB2026022616 - Denial of service during LLDP processing in Cisco NX-OS and Cisco UCS
Published: February 26, 2026
Security Bulletin ID
SB2026022616
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Buffer Access with Incorrect Length Value (CVE-ID: CVE-2026-20010)
CWE-ID: CWE-805 - Buffer Access with Incorrect Length Value
CVSSv4: 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/E:U
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.
Remediation
Install update from vendor's website.