CVE-2021-20028
Exploited in the wild. In CISA KEV since 2022‑03‑28. A vendor fix is available.
What to do
The vendor has published a fix. Version details are below where the sources state them.
What it is
From the CVE record
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
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Listed as exploited in the wild since 2022-03-28.
US federal agencies must remediate by 2022-04-18.
Known use in ransomware campaigns.
The impacted product is end-of-life and should be disconnected if still in use.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
30% chance of exploitation activity in the next 30 days, which ranks it in the 98th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
8 events over 1786 days, from the signal feeds we watch.
- OpenVAS check added
- EPSS band changehigh → moderate
- Patch availablerecord updated
- Added to CISA KEVransomware campaign
- Publishedweakness classified, att&ck mapped
Affected products
- SonicWall SRA/SMA100Networking Infrastructure
- sma 210 firmwareNetworking Infrastructure
- sma 410 firmwareNetworking Infrastructure
- sma 500v firmwareNetworking Infrastructure
- sra 4600 firmwareNetworking Infrastructure
- sra 1600 firmwareNetworking Infrastructure
- sra va firmwareNetworking Infrastructure
- SMA 210Networking Infrastructure
And 2 more affected products. See all after sign-in
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Scored 9.8 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity LowNo special conditions — the attack can be reliably reproduced
- Privileges Required NoneNo authentication required — anyone can exploit this
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity HighTotal loss of integrity — attacker can modify any data in the component
- Availability HighTotal denial of service — the component is completely unavailable
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
- Initial AccessT1190Exploit Public-Facing Applicationhigh confidence
Sources
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We'll flag the next CVE, public exploit or patch for SonicWall SRA/SMA100, not every advisory. This one: actively exploited.
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