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CVE-2021-20022 is an arbitrary file upload vulnerability in SonicWall Email Security version 10.0.9.x. The flaw allows a post-authenticated attacker to upload an arbitrary file to the remote host. Available reporting indicates the vulnerability affected SonicWall Email Security deployments and was serious enough to be used in real-world intrusions alongside related SonicWall Email Security flaws. In observed exploitation, attackers were able to place a web shell on the server and then execute commands with inherited NT AUTHORITY\SYSTEM privileges, indicating that successful file upload could be leveraged to achieve server-side code execution and full compromise of the appliance or host.
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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.
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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.