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CVE-2026-45607: Windows Hyper-V Remote Code Execution Vulnerability

highCVSS 8.4CVE-2026-45607
Out-of-bounds read in Windows Hyper-V allows an unauthorized attacker to execute code locally.

CSIRTS triage

vendor: Microsoftproduct: Windows Hyper-VRemote code execution
What
Out-of-bounds read in Windows Hyper-V allows an unauthorized attacker to execute code locally.
Who is affected
Deployments of Windows Hyper-V.
Urgency
Remediation is high urgency due to the potential for local code execution and the high severity rating.
Action
Apply the latest security updates for Windows Hyper-V.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
high — CVSS 8.4
Published
2026-06-09
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45607

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-45607coverage & exploitation statusNVD · CVE.org

Recent advisories for Windows Hyper-V Remote

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

More from Microsoft Security Response Center