Windows Kernel Elevation of Privilege Vulnerability
CVE-2021-33771 is a Microsoft Windows Kernel elevation of privilege vulnerability. The provided content identifies it as a Windows kernel flaw, assigns it a CVSSv3 score of 7.8, and states that it was observed being exploited in the wild prior to patch release. The content further notes that Microsoft discovered this vulnerability in connection with Candiru activity used to infect Windows systems, but does not provide technical details such as the specific vulnerable component, function, root cause, or exploitation primitive.
Are you exposed to this one?
Mallory correlates every CVE against your assets, your vendors, and active adversary campaigns. Know which vulnerabilities matter for you, not just which ones are loud.
Impact, mitigation & remediation
What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
Impact
What an attacker gets, and what they’ve been doing with it.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Affected products & vendors
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.
Recent activity
2 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.
The version that knows your environment.
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.