Email Security and management
CVE-2021-20022: Email Security Unrestricted Upload of File
SonicWall Email Security version 10.0.9.x contains a vulnerability that allows a post-authenticated attacker to upload an arbitrary file to the remote host.
Published
ExploitedYes, in CISA KEVAdded 3 Nov 2021
Ransomware useKnownPer CISA
SeverityHIGHCVSS 3.1 7.2
EPSS17%Chance of exploitation in 30 days
Public exploitNot tracked
FixSee advisory
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| Email Security 10.0 | See the advisory |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
SonicWall Email Security version 10.0.9.x contains a vulnerability that allows a post-authenticated attacker to upload an arbitrary file to the remote host.
Exploitation
CISA lists this CVE as exploited in the wild since 3 Nov 2021, including in ransomware campaigns.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 13 Oct 2026.