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CVE-2026-47652 is a critical remote code execution vulnerability in Windows Hyper-V. Available reporting describes the flaw as an out-of-bounds read condition, with some advisories also characterizing it as a heap-based memory corruption issue, in the Hyper-V virtualization boundary handling. Exploitation is performed from a guest or otherwise locally authorized context in a virtualized environment by sending specially crafted requests, including crafted hypercall or hardware-resource file operation requests, to the Hyper-V host. Successful exploitation can result in code execution across the virtualization boundary on the host system.
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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.
5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A remote code execution vulnerability in Windows Hyper-V that could result in unauthorized code execution, compromise of sensitive workloads, and disruption of hosted services.
A critical remote code execution vulnerability in Windows Hyper-V that can enable guest-to-host escape.
A critical remote code execution vulnerability in Windows Hyper-V caused by out-of-bounds read conditions that may allow guest-to-host compromise.
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.