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CVE-2021-20028 is an SQL injection vulnerability caused by improper neutralization of special elements in SQL commands in end-of-life SonicWall Secure Remote Access (SRA) appliances. It affects all 8.x firmware versions and 9.x firmware through 9.0.0.9-26sv. The vulnerable feature was deprecated in 10.x firmware, and SMA 1000 Series products are unaffected. The vulnerability has been exploited in the wild, including in a campaign leveraging it alongside CVE-2019-7481 to deploy LockBit ransomware. The specific vulnerable function is not identified.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A vulnerability affecting SonicWall SRA appliances; the content states affected appliances are end-of-life and have no available patches, making decommissioning necessary.
A critical SonicWall vulnerability (CVSS 9.8) listed in CISA KEV. The content indicates limited triggering during the campaign and explicitly warns that end-of-life SonicWall SRA appliances affected by this CVE have no patches available, recommending decommissioning/disconnection.
A vulnerability affecting SonicWall SMA100 appliances that was referenced as part of an exploitation campaign on internet-exposed devices to deploy LockBit ransomware.
A known exploited vulnerability affecting the unpatched SonicWall SMA 100 Series appliances investigated in this campaign. Its technical mechanism is not described, and exploitation by UNC4540 or use in the earlier ransomware attacks is not established.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.