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CVE-2025-24993 is a heap-based buffer overflow in the Windows NTFS file system component. The flaw is triggered when Windows processes a specially crafted virtual hard disk containing malicious NTFS structures, causing memory corruption in heap-managed data during NTFS parsing or handling. Microsoft classifies the issue as allowing code execution by an unauthorized attacker, but the available reporting indicates exploitation occurs in a local context after the target system mounts the malicious VHD. The vulnerability was reported as actively exploited in the wild at the time of disclosure.
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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.
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A Windows NTFS remote code execution vulnerability, apparently similar to the malicious-VHD NTFS issues, and reported as exploited in the wild.
A Windows NTFS memory corruption vulnerability affecting nearly all Windows systems by default, enabling local code execution by unauthorized attackers.
A heap-based buffer overflow in NTFS; explicitly described as known exploited.
Heap-based buffer overflow remote code execution vulnerability in Windows NTFS that is actively exploited in the wild.
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.