CVE-2021-20028: in the CISA KEV catalogue
SonicWall Secure Remote Access (SRA) SQL Injection Vulnerability. CISA added CVE-2021-20028 to the Known Exploited Vulnerabilities catalogue on 2022-03-28 with a default due date of 2022-04-18. Known ransomware campaign use: Known. Forensic triage flag: No.
SonicWall Secure Remote Access (SRA) products contain an improper neutralization of a SQL Command leading to SQL injection. (CISA description)
- Vendor / product
- SonicWall Secure Remote Access (SRA)
- CWE
- CWE-89
- CISA required action
- The impacted product is end-of-life and should be disconnected if still in use.
- EPSS
- 30%, percentile 98 (scored 2026-11-03)
EPSS puts about 30 in 100 odds (30%) on exploitation activity being observed in the next 30 days. Its score is higher than or equal to that of 98% of scored CVEs. This is a model estimate about exploitation anywhere, not about your environment.
Vendor and reference links (from CISA)
Your own deadline under CISA BOD 26-04 depends on exposure, automatability and technical impact: work it out with the BOD 26-04 calculator.
Frequently asked questions
Is CVE-2021-20028 in the CISA KEV catalogue?
Yes. CISA added CVE-2021-20028 (SonicWall Secure Remote Access (SRA) SQL Injection Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2022-03-28. CISA's default due date for it is 2022-04-18.
Is CVE-2021-20028 used in ransomware attacks?
CISA marks known ransomware campaign use as Known for CVE-2021-20028.
What should I do about CVE-2021-20028?
CISA's required action: The impacted product is end-of-life and should be disconnected if still in use.
Sources
- CISA, Known Exploited Vulnerabilities Catalog (accessed 2026-11-03)
- FIRST, Exploit Prediction Scoring System (EPSS) (EPSS by FIRST; scores generated by Empirical Security)
- NVD record for CVE-2021-20028