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CVE-2021-1636 is a Microsoft SQL Server elevation of privilege vulnerability. Available reporting identifies it as a known flaw that was exploited in the wild to gain an initial foothold in at least one Ukrainian organization prior to deployment of destructive malware. The provided information does not include the vulnerable component, root cause, affected versions, or the specific code path involved, so a more detailed technical characterization cannot be stated from the available data.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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.
5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Microsoft SQL Server elevation of privilege vulnerability cited as one possible initial compromise vector in activity associated with HermeticWiper.
A specific vulnerability identified as CVE-2021-1636 that was reportedly used as one of the initial access exploits in attacks associated with HermeticWiper intrusions, targeting Microsoft SQL Server.
A known Microsoft SQL Server vulnerability that attackers exploited to gain initial access to a Ukrainian organization prior to deploying HermeticWiper.
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.