CVE DATABASE / CVE-2021-20028
CVE-2021-20028
SonicWall Secure Remote Access (SRA) SQL Injection Vulnerability
CVSS 9.8 · CRITICAL
⚠ CISA KEV — ACTIVELY EXPLOITED
RANSOMWARE
On the CISA KEV catalog
Confirmed exploited in the wild. Added 2022-03-28.
Federal remediation due 2022-04-18.
Required action: The impacted product is end-of-life and should be disconnected if still in use.
Summary
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
| Base score | 9.8 (CRITICAL) |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| Attack vector | NETWORK |
| Attack complexity | LOW |
| Privileges required | NONE |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity | HIGH |
| Availability | HIGH |
Weakness type (CWE)
Affected products
Sonicwall sma 210 firmwareSonicwall sma 210Sonicwall sma 410 firmwareSonicwall sma 410Sonicwall sma 500v firmwareSonicwall sma 500vSonicwall sra 4600 firmwareSonicwall sra 4600Sonicwall sra 1600 firmwareSonicwall sra 1600Sonicwall sra va firmwareSonicwall sra va
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References
- https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0017
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-20028
Data: NIST NVD + CISA KEV. NVD last modified 2025-10-31. Always verify against the vendor advisory before acting.