CVE-2021-20023

CVE-2021-20023

Vendor Sonicwall
Product Email Security
Weakness CWE-22 · Path traversal
KEV Status Known Exploited
Ransomware Used in campaigns
Published April 20, 2021
Last update October 21, 2025
View on NVD All CVEs

CVSS base score

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What the vulnerability does

01Description

SonicWall Email Security version 10.0.9.x contains a vulnerability that allows a post-authenticated attacker to read an arbitrary file on the remote host.

CISA mandated remediation

02CISA Required Action

Apply updates per vendor instructions.

Key dates

03Disclosure timeline

April 20, 2021 CVE published
October 21, 2025 Record updated