Loading vulnerability…
CVE-2021-24092 is a local elevation-of-privilege vulnerability in Microsoft Defender that allows a non-administrative local user to overwrite arbitrary files by creating a hard link that targets the driver's log path. The flaw arises from improper handling of file operations on a privileged path, enabling an attacker to redirect a write performed by a higher-privileged Defender component to an attacker-chosen file. Successful exploitation can be used to replace or corrupt protected files and thereby escalate privileges on the local system.
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.
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.
2 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A privilege escalation vulnerability in Microsoft Defender's BTR.sys driver that allowed a local non-administrator user to overwrite arbitrary files via a hard link placed on the driver's log path.
A privilege escalation vulnerability in Microsoft Defender's BTR.sys driver that allowed a local non-administrator to overwrite arbitrary files via a hard link at the driver's log path.
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.