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CVE-2021-20016

Published: Feb 3, 2021Updated: Oct 31, 2025 Sources: CVE List NVD BDUCWE-89
NVD MITRE
9.8CVSSCRITICAL
EPSS Score
40.0%
Top 1.6%
CISA KEV
Active Exploitation
Since Nov 3, 2021
Exploits
No Known Exploits
Remediation
Patch Available

Description

A SQL-Injection vulnerability in the SonicWall SSLVPN SMA100 product allows a remote unauthenticated attacker to perform SQL query to access username password and other session related information. This vulnerability impacts SMA100 build version 10.x.

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 SMA100SonicWallNetworking Infrastructure
SMA 100SonicWallNetworking Infrastructure
SMA 200SonicWallNetworking Infrastructure
SMA 210SonicWallNetworking Infrastructure
SMA 400SonicWallNetworking Infrastructure
sonicwallcommercialUSNetworking Infrastructureaka sonicwall
and 8 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:Nov 3, 2021
Remediation due:Nov 17, 2021
Ransomware:Known ransomware use

Required action: Apply updates per vendor instructions.

Official Patch Available
Workaround Available

MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0001
psirt.global.sonicwall.com
https://nvd.nist.gov/vuln/detail/CVE-2021-20016
nvd.nist.gov
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0001
psirt.global.sonicwall.com
and 3 more references View all →

Timeline

Published
Feb 3, 2021
Added to CISA KEV
Nov 3, 2021
Last Updated
Oct 31, 2025

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