Windows Hyper-V Out-of-Bounds Read Remote Code Execution Vulnerability
CVE-2026-45607 is a critical out-of-bounds read vulnerability in Windows Hyper-V. According to the provided content, the flaw affects Hyper-V and is classified as CWE-125. Microsoft describes it as allowing an unauthorized attacker to execute code locally. Supporting reporting further characterizes this issue as one of several critical Hyper-V flaws that can enable guest-to-host escape, where an attacker on a guest VM can trigger the vulnerability via specially crafted file operation requests to hardware resources and potentially achieve code execution on the host server.
Are you exposed to this one?
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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
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
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.
An out-of-bounds read vulnerability in Windows Hyper-V that allows local code execution by an unauthorized attacker.
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.