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CVE-2021-20028

Published: Aug 4, 2021Updated: Oct 31, 2025 Sources: CVE List NVD BDUCWE-89
NVD MITRE
9.8CVSSCRITICAL
EPSS Score
30.1%
Top 2.0%
CISA KEV
Active Exploitation
Since Mar 28, 2022
Exploits
No Known Exploits
Remediation
Patch Available

Description

Improper neutralization of a SQL Command leading to SQL Injection vulnerability impacting end-of-life Secure Remote Access (SRA) products, specifically the SRA appliances running all 8.x firmware and 9.0.0.9-26sv or earlier

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-89

Affected Products

SonicWall SRA/SMA100SonicWallNetworking Infrastructure
SMA 210SonicWallNetworking Infrastructure
SMA 410SonicWallNetworking Infrastructure
SMA 500vSonicWallNetworking Infrastructure
sma 210 firmwaresonicwallNetworking Infrastructure
sonicwallcommercialUSNetworking Infrastructureaka sonicwall
and 5 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

CISA Known Exploited Vulnerability
Added to KEV:Mar 28, 2022
Remediation due:Apr 18, 2022
Ransomware:Known ransomware use

Required action: The impacted product is end-of-life and should be disconnected if still in use.

Official Patch Available

MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0017
psirt.global.sonicwall.com
https://www.cisa.gov/sites/default/files/csv/known_exploited_vulnerabilities.csv
cisa.gov
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20028
cisa.gov

Timeline

Published
Aug 4, 2021
Added to CISA KEV
Mar 28, 2022
Last Updated
Oct 31, 2025

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