CVE-2023-0656: SonicWall SonicOS

High severity, CVSS 7.5. EPSS: 41.3% chance of exploitation in the next 30 days.

A Stack-based buffer overflow vulnerability in the SonicOS allows a remote unauthenticated attacker to cause Denial of Service (DoS), which could cause an impacted firewall to crash.

Affected products

• SonicWall SonicOS: up to and including 7.0.1-5111; up to and including 7.0.1-5083; up to and including 6.5.4.4-44v-21-1551

Published 2023-03-02. Last modified 2026-06-17.