What’s Vulnerable › Vulnerabilities

CVE-2021-20049

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-12-23 · updated 2026-06-17
• Weakness: CWE-204

Description

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: before 10.0.0.0; 10.2.0.8-37sv, 10.2.1.2-24sv — fixed in 10.0.0.0
• SonicWall Sma 200 Firmware: before 10.0.0.0; 10.2.0.8-37sv, 10.2.1.2-24sv — fixed in 10.0.0.0
• SonicWall Sma 210 Firmware: before 10.0.0.0; 10.2.0.8-37sv, 10.2.1.2-24sv — fixed in 10.0.0.0
• SonicWall Sma 400 Firmware: before 10.0.0.0; 10.2.0.8-37sv, 10.2.1.2-24sv — fixed in 10.0.0.0
• SonicWall Sma 410 Firmware: before 10.0.0.0; 10.2.0.8-37sv, 10.2.1.2-24sv — fixed in 10.0.0.0
• SonicWall Sma 500V Firmware: before 10.0.0.0; 10.2.0.8-37sv, 10.2.1.2-24sv — fixed in 10.0.0.0

How to fix

Upgrade to a fixed version: SonicWall SMA 100 10.0.0.0; SonicWall Sma 200 Firmware 10.0.0.0; SonicWall Sma 210 Firmware 10.0.0.0; SonicWall Sma 400 Firmware 10.0.0.0; SonicWall Sma 410 Firmware 10.0.0.0; SonicWall Sma 500V Firmware 10.0.0.0. Check the vendor advisory for mitigations.

References

• https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0030
• https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0030

Get alerted when CVE-2021-20049 or the next vulnerability affects your stack