CVE-2021-20028
SonicWall Secure Remote Access (SRA) SQL Injection Vulnerability
SonicWall Secure Remote Access (SRA)
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
Exploitation status
CISA Known Exploited Vulnerabilities
Listed by CISA on 28 March 2022. US federal agencies were required to remediate it by 18 April 2022. CISA records this vulnerability as known to be used in ransomware campaigns.
EPSS — exploitation probability
FIRST puts the probability of exploitation activity in the next 30 days at 30.1%, which is higher than 98.2% of all scored vulnerabilities. EPSS is a forecast of activity, not a measure of severity, and it is rescored daily.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Frequently asked questions
Is CVE-2021-20028 being exploited by ransomware groups?
No ransomware group in this database is currently recorded as exploiting CVE-2021-20028.
What does CVE-2021-20028 affect?
CVE-2021-20028 affects SonicWall Secure Remote Access (SRA). 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
How severe is CVE-2021-20028?
CVE-2021-20028 is rated CRITICAL with a CVSS base score of 9.8. EPSS puts the probability of exploitation in the next 30 days at 30.1%, higher than 98.2% of all scored vulnerabilities. It is listed in the CISA Known Exploited Vulnerabilities catalog, with a federal remediation deadline of 18 April 2022.
How should organisations respond to CVE-2021-20028?
Apply the vendor patch for SonicWall Secure Remote Access (SRA) as the first priority, and treat any internet-facing instance as the most urgent. Because this vulnerability is associated with ransomware activity, also review whether the affected systems were reachable before patching, rather than assuming that patching alone closes the incident.