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CISA Known Exploited Vulnerability

This CVE is actively exploited in the wild. CISA mandates federal agencies to patch immediately.

CVE

CVE-2021-20021

9.8

CVSScritical

Exploitable remotely over the internet · no authentication required.

Description

A vulnerability in the SonicWall Email Security version 10.0.9.x allows an attacker to create an administrative account by sending a crafted HTTP request to the remote host.

Attack Vector

Network

Privileges Req.

None

User Interaction

None

email security

Updated Oct 24, 2026View on NVD →

S4E scanner

criticalProduct Based Web Vulnerabilities~10 seconds

CVE-2021-20021 Scanner

CVE-2021-20021 Scanner - Unauthenticated Admin Account Creation vulnerability in SonicWall Email Security

Used 2.9k times · 3.4k assets checked · url

Scanner page →Run scanner

CVE history: email security

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