High severity · published Apr 9, 2021
CVE-2021-20022
SonicWall Email Security Unrestricted Upload of File Vulnerability
RansomwareIn wildKEV
7.2
CVSS
16.6%
EPSS
Yes
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)16.6% · higher than 97% of CVEs
Exploited in the wildYes
CISA KEVListed Nov 3, 2021
Federal remediation dueNov 17, 2021
Ransomware campaign useKnown
Affected products
Which versions
ES
Email Security · SonicWall
10.0.9 and earlier · source: vendor, NVD
ES
Email Security Appliance 3300 Firmware · Sonicwall
before 10.0.9.6105 · source: NVD
ES
Email Security Appliance 4300 Firmware · Sonicwall
before 10.0.9.6105 · source: NVD
ES
Email Security Appliance 5000 Firmware · Sonicwall
before 10.0.9.6105 · source: NVD
ES
Email Security Appliance 5050 Firmware · Sonicwall
before 10.0.9.6105 · source: NVD
ES
Email Security Appliance 7000 Firmware · Sonicwall
before 10.0.9.6105 · source: NVD
ES
Email Security Appliance 7050 Firmware · Sonicwall
before 10.0.9.6105 · source: NVD
ES
Email Security Appliance 8300 Firmware · Sonicwall
before 10.0.9.6105 · source: NVD
ES
Email Security Appliance 9000 Firmware · Sonicwall
before 10.0.9.6105 · source: NVD
ES
Email Security Virtual Appliance · Sonicwall
before 10.0.9.6105 · source: NVD
HE
Hosted Email Security · Sonicwall
before 10.0.9.6103 · source: NVD
SE
SonicWall Email Security · SonicWall
All versions, or not specified · source: KEV
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-20022
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-20022
CISA KEV catalogue
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
x_refsource_CONFIRM
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0008
More from Email Security
10.0
CVE-2021-44228
Apache Log4j2 JNDI features do not protect against attacker controlled LDAP and other JNDI related endpoints
9.8
CVE-2021-20021
SonicWall Email Security Improper Privilege Management Vulnerability
9.0
CVE-2021-45046
Apache Log4j2 Thread Context Message Pattern and Context Lookup Pattern vulnerable to a denial of service attack
4.9
CVE-2021-20023
SonicWall Email Security Path Traversal Vulnerability
7.8
CVE-2026-66150
Improper Control of Generation of Code ('Code Injection') Vulnerability in the SonicWall Email Security appliance allows an authenticated attacker with access to the SonicWall…