CVE-2021-20049: SonicWall SMA 100 Firmware

High severity, CVSS 7.5. EPSS: 1.3% chance of exploitation in the next 30 days.

A vulnerability in SonicWall SMA100 password change API allows a remote unauthenticated attacker to perform SMA100 username enumeration based on the server responses. This vulnerability impacts 10.2.1.2-24sv, 10.2.0.8-37sv and earlier 10.x versions.

Affected products

• SonicWall SMA 100 Firmware: before 10.0.0.0 (fixed in 10.0.0.0); version 10.2.0.8-37sv only; version 10.2.1.2-24sv only
• SonicWall SMA 200 Firmware: before 10.0.0.0 (fixed in 10.0.0.0); version 10.2.0.8-37sv only; version 10.2.1.2-24sv only
• SonicWall SMA 210 Firmware: before 10.0.0.0 (fixed in 10.0.0.0); version 10.2.0.8-37sv only; version 10.2.1.2-24sv only
• SonicWall SMA 400 Firmware: before 10.0.0.0 (fixed in 10.0.0.0); version 10.2.0.8-37sv only; version 10.2.1.2-24sv only
• SonicWall SMA 410 Firmware: before 10.0.0.0 (fixed in 10.0.0.0); version 10.2.0.8-37sv only; version 10.2.1.2-24sv only
• SonicWall SMA 500v Firmware: before 10.0.0.0 (fixed in 10.0.0.0); version 10.2.0.8-37sv only; version 10.2.1.2-24sv only

Published 2021-12-23. Last modified 2026-06-17.