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Vulnerabilities

Vulnerability · CVE-2021-20028

SonicWall Secure Remote Access (SRA) SQL Injection Vulnerability

Published Jun 8, 2021 · catalog updated Jun 16, 2026 · SonicWall Secure Remote Access (SRA)

Patch now

CVE-2021-20028 is in the CISA known-exploited catalog, due Apr 18, 2022. Confirm SonicWall Secure Remote Access (SRA) against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
Severity
Critical9.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
30.08%
Remediation
Remediation guidance
Affected products
cpe sonicwall/sma 210 firmware · cpe sonicwall/sma 410 firmware · cpe sonicwall/sma 500v firmware · cpe sonicwall/sra 1600 firmware · cpe sonicwall/sra 4600 firmware · cpe sonicwall/sra va firmware

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

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe sonicwall/sma 210 firmwareversion unspecified
  • cpe sonicwall/sma 410 firmwareversion unspecified
  • cpe sonicwall/sma 500v firmwareversion unspecified
  • cpe sonicwall/sra 1600 firmwareversion unspecified
  • cpe sonicwall/sra 4600 firmwareversion unspecified
  • cpe sonicwall/sra va firmwareversion unspecified
  • vendor SonicWall Secure Remote Access (SRA)version unspecified

How to fix CVE-2021-20028

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2021-20028 is in the CISA known-exploited catalog, due Apr 18, 2022. Confirm SonicWall Secure Remote Access (SRA) against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. The impacted product is end-of-life and should be disconnected if still in use.

What should an analyst verify?

CWE-89: SQL Injection. EPSS 30.08%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 4, 2021 · Catalog

    Detected

    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

  2. Mar 28, 2022 · CISA KEV

    Known exploited

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

  3. Apr 18, 2022 · CISA KEV

    Remediation due

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

  4. Jun 16, 2026 · Catalog

    Updated

    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

Sources

  • CISA KEVConfirmed exploitationCVE-2021-20028

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

    cisa.gov
  • CVE.orgVulnerability recordCVE-2021-20028

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2021-20028

    30-day exploitation probability 30.1%

    first.org
  • NIST NVDVulnerability recordCVE-2021-20028

    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

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2021-20028

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

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.