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CVE-2021-20028

SonicWall Secure Remote Access (SRA) SQL Injection

9.8 CRITICALActively exploited (CISA KEV)Used in ransomwareEPSS 30.1%
  1. Published4 Aug 2021
  2. Added to CISA KEV28 Mar 2022
  3. Remediation due18 Apr 2022
Actively exploited (CISA KEV)

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

Added to KEV: 28 Mar 2022Federal remediation due: 18 Apr 2022Used in ransomware

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 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

SonicWall Sma 210 Firmware≥ 8.0.0.0 < 9.0.0.10-28sv
SonicWall Sma 410 Firmware≥ 8.0.0.0 < 9.0.0.10-28sv
SonicWall Sma 500v Firmware≥ 8.0.0.0 < 9.0.0.10-28sv
SonicWall Sra 1600 Firmware≥ 8.0.0.0 < 9.0.0.10-28sv
SonicWall Sra 4600 Firmware≥ 8.0.0.0 < 9.0.0.10-28sv
SonicWall Sra Va Firmware≥ 8.0.0.0 < 9.0.0.10-28sv

Remediation

Fixed in
SonicWall Sma 210 Firmware≥ 9.0.0.10-28sv
SonicWall Sma 410 Firmware≥ 9.0.0.10-28sv
SonicWall Sma 500v Firmware≥ 9.0.0.10-28sv
SonicWall Sra 1600 Firmware≥ 9.0.0.10-28sv
SonicWall Sra 4600 Firmware≥ 9.0.0.10-28sv
SonicWall Sra Va Firmware≥ 9.0.0.10-28sv

References

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Frequently asked

Is CVE-2021-20028 being actively exploited?

Yes. CVE-2021-20028 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 28 Mar 2022. It has been used in ransomware campaigns.

How severe is CVE-2021-20028?

CVE-2021-20028 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 30.1% probability of exploitation.

Which products are affected by CVE-2021-20028?

Affected products include SonicWall Sma 210 Firmware, SonicWall Sma 410 Firmware, SonicWall Sma 500v Firmware, SonicWall Sra 1600 Firmware, SonicWall Sra 4600 Firmware, and 1 more.

How do I fix CVE-2021-20028?

Upgrade affected software to a fixed version, for example SonicWall Sma 210 Firmware 9.0.0.10-28sv, SonicWall Sma 410 Firmware 9.0.0.10-28sv, SonicWall Sma 500v Firmware 9.0.0.10-28sv or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2021-20028 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, a risk for it never ranks below high, and the update that fixes it moves to the Emergency patch lane. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.