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Known exploited vulnerability · SonicWall

CVE-2021-20023: SonicWall Email Security Path Traversal Vulnerability

mediumCVSS 3.1 4.9Exploited

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.

Published Apr 20, 2021 · Updated Oct 1, 2026

Required action

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Advisory details

From the National Vulnerability Database. This product uses the NVD API but is not endorsed or certified by the NVD.

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.

References

How this page is made: the data panel comes from the GitHub Advisory Database, CISA’s KEV catalog, the NVD and FIRST EPSS, and updates twice a day. No analysis has been written for this entry yet. Methodology

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