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CVE-2021-20028

CRITICAL
9.8
CVSS Score
Published: August 4, 2021 at 07:10 PM UTC
Updated: June 17, 2026 at 03:33 AM UTC
14 products affected across 1 vendorSMA 410 FirmwareSMA 210 FirmwareSMA 500V Firmware

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Severity
CRITICAL9.8
Exploitation
CISA KEV
Exploit prediction
EPSS 30%
SSVC
Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score30.1%

EPSS (Exploit Prediction Scoring System) estimates a 30.1% chance this CVE is exploited in the wild within the next 30 days — higher than 98% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

SonicWall Secure Remote Access (SRA) products contain an improper neutralization of a SQL Command leading to SQL injection.

Required Action
The impacted product is end-of-life and should be disconnected if still in use.
Ransomware Use
Known
Added to KEV
Mar 28, 2022
Remediation Due
Apr 18, 2022
1658 days overdue
Notes
https://nvd.nist.gov/vuln/detail/CVE-2021-20028

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

SMA 210 Firmware· SonicWall
95%
8.0.0.0 ≤ v < 9.0.0.10-28sv
Affected range stops below 9.0.0.10-28sv, so it looks safe — our inference, not a vendor statement
sonicwall-sma-210 (same device)
SMA 410 Firmware· SonicWall
95%
8.0.0.0 ≤ v < 9.0.0.10-28sv
Affected range stops below 9.0.0.10-28sv, so it looks safe — our inference, not a vendor statement
sonicwall-sma-410 (same device)
SMA 500V Firmware· SonicWall
95%
8.0.0.0 ≤ v < 9.0.0.10-28sv
Affected range stops below 9.0.0.10-28sv, so it looks safe — our inference, not a vendor statement
sonicwall-sma-500v (same device)
Sra 1600 Firmware· SonicWall
95%
8.0.0.0 ≤ v < 9.0.0.10-28sv
Affected range stops below 9.0.0.10-28sv, so it looks safe — our inference, not a vendor statement
sonicwall-sra-1600 (same device)
Sra 4600 Firmware· SonicWall
95%
8.0.0.0 ≤ v < 9.0.0.10-28sv
Affected range stops below 9.0.0.10-28sv, so it looks safe — our inference, not a vendor statement
sonicwall-sra-4600 (same device)
Sra Va Firmware· SonicWall
95%
8.0.0.0 ≤ v < 9.0.0.10-28sv
Affected range stops below 9.0.0.10-28sv, so it looks safe — our inference, not a vendor statement
sonicwall-sra-va (same device)
SMA 100· SonicWall
60%
v ≤ 9.0.0.9-26sv8.x firmware
Secure Remote Access (SRA)· SonicWall
60%
v ≤ 9.0.0.9-26sv8.x firmware
Sma 210· SonicWalldevice
80%
All versions
Sma 410· SonicWalldevice
80%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0017
US Government Resource
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20028

SSVC — Action Prioritization

SSVCActiveAutomatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

9.8CRITICALCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-89

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