CVE Watch—

CVE-2021-20022

SonicWall Email Security Unrestricted Upload of File Vulnerability

CVSS

—

No CVSS

EPSS

16.5%

p97

KEV

YES

Nov 3, 2021

Exploit Today

0-100

Published: — · Last modified: —

EPSS · 30d

16.5%EPSS · 30 days16.5%

2026-06-302026-07-16

KEV catalog record

Product

SonicWall / SonicWall Email Security

Vulnerability

SonicWall Email Security Unrestricted Upload of File Vulnerability

Added to KEV

Nov 3, 2021

Remediate by

Nov 17, 2021

Known ransomware use

Yes

Summary description

SonicWall Email Security contains an unrestricted upload of file with dangerous type vulnerability that allows a post-authenticated attacker to upload a file to the remote host. This vulnerability has known usage in a SonicWall Email Security exploit chain along with CVE-2021-20021 and CVE-2021-20023 to achieve privilege escalation.

Required action

Apply updates per vendor instructions.

Notes

https://nvd.nist.gov/vuln/detail/CVE-2021-20022

Related CVEs

CVECVSSEPSSKEVRExploitTitleMod.

CVE-2021-20021—

99.7%

KEV—80SonicWall Email Security Improper Privilege Management Vulnerability—CVE-2021-20023—

98.8%

KEV—80SonicWall Email Security Path Traversal Vulnerability—