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CVE-2021-31979 is a Microsoft Windows kernel elevation of privilege vulnerability. Successful exploitation allows an attacker who already has local access and low privileges on a Windows system to elevate privileges within the operating system kernel security boundary. The vulnerability was observed exploited in the wild prior to patch release, including in activity associated with Candiru operations. Publicly available context identifies the issue at a high level as a Windows kernel EoP flaw, but does not provide specific vulnerable functions or root-cause implementation details.
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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.
A Windows zero-day vulnerability used by Candiru to infect Windows systems and patched by Microsoft in July 2021.
Windows Kernel elevation of privilege vulnerability observed exploited in attacks before patches were released.
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.