CVE-2021-20024: SonicWall Switch

High severity, CVSS 8.1. EPSS: 0.6% chance of exploitation in the next 30 days.

Multiple Out-of-Bound read vulnerability in SonicWall Switch when handling LLDP Protocol allows an attacker to cause a system instability or potentially read sensitive information from the memory locations.

Affected products

• SonicWall Switch: up to and including 1.0.0.5-16

Published 2021-07-09. Last modified 2026-06-17.