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CVE-2026-42972: Windows Hyper-V Information Disclosure Vulnerability

mediumCVSS 5.5CVE-2026-42972
Exposure of sensitive information to an unauthorized actor in Windows Hyper-V allows an authorized attacker to disclose information locally.

CSIRTS triage

vendor: Microsoftproduct: Windows Hyper-VInformation disclosure
What
Sensitive information can be disclosed to unauthorized actors.
Who is affected
Users of Windows Hyper-V.
Urgency
Remediation is necessary due to the medium severity rating.
Action
Apply the security update to address the information disclosure.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
medium — CVSS 5.5
Published
2026-06-09
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42972

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-2026-42972coverage & exploitation statusNVD · CVE.org

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