CVE Watch—

CVE-2021-20023

SonicWall Email Security Path Traversal Vulnerability

CVSS

—

No CVSS

EPSS

51.4%

p99

KEV

YES

Nov 3, 2021

Exploit Today

0-100

Published: — · Last modified: —

EPSS · 30d

51.4%EPSS · 30 days51.4%

2026-06-302026-07-16

KEV catalog record

Product

SonicWall / SonicWall Email Security

Vulnerability

SonicWall Email Security Path Traversal Vulnerability

Added to KEV

Nov 3, 2021

Remediate by

Nov 17, 2021

Known ransomware use

Yes

Summary description

SonicWall Email Security contains a path traversal vulnerability that allows a post-authenticated attacker to read files on the remote host. This vulnerability has known usage in a SonicWall Email Security exploit chain along with CVE-2021-20021 and CVE-2021-20022 to achieve privilege escalation.

Required action

Apply updates per vendor instructions.

Notes

https://nvd.nist.gov/vuln/detail/CVE-2021-20023

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