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CVE-2025-49683 is an integer overflow or wraparound vulnerability in Microsoft Virtual Hard Disk (VHDX) handling. The flaw can occur when arithmetic involving VHDX data is not properly bounded, potentially causing incorrect size calculations or memory handling during processing of a crafted VHDX file. Microsoft indicates that successful exploitation allows an unauthorized attacker to execute code locally. Specific vulnerable functions, affected product versions, and implementation details are not available in the provided information.
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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.
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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.