CVE-2021-20026: SonicWall Network Security Manager

High severity, CVSS 8.8. EPSS: 11.6% chance of exploitation in the next 30 days.

A vulnerability in the SonicWall NSM On-Prem product allows an authenticated attacker to perform OS command injection using a crafted HTTP request. This vulnerability affects NSM On-Prem 2.2.0-R10 and earlier versions.

Affected products

• SonicWall Network Security Manager: before 2.2.0 (fixed in 2.2.0); version 2.2.0 only

Published 2021-05-27. Last modified 2026-06-17.