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CVE-2021-20021

KEV · Ransomware
Updated Aug 12, 2026 · PUBLISHED
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Description

SonicWall Email Security contains an improper privilege management vulnerability that allows an attacker to create an administrative account by sending a crafted HTTP request to the remote host. This vulnerability has known usage in a SonicWall Email Security exploit chain along with CVE-2021-20022 and CVE-2021-20023 to achieve privilege escalation.

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Affected packages

PackageVendor / ProductVersion rangeStatus
Email SecuritySonicWall / Email Security10.0.9 and earlieraffected