CVE-2026-42907: Windows Shell Information Disclosure Vulnerability

mediumCVSS 6.5CVE-2026-42907

Exposure of sensitive information to an unauthorized actor in Windows Shell allows an authorized attacker to disclose information locally.

CSIRTS triage

vendor: Microsoft product: Windows Shell Information disclosure

What: Exposure of sensitive information to an unauthorized actor in Windows Shell allows an authorized attacker to disclose information locally.
Who is affected: Users of Windows Shell with sensitive information.
Urgency: Remediation is important due to the medium severity and risk of information disclosure.
Action: Apply the latest security updates from Microsoft.

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 6.5
Published: 2026-06-09
Exploitation: Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42907

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.

Low exploitation riskCVE-2026-429070.82% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 53% of all scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2026-42907	coverage & exploitation status	NVD · CVE.org

Recent advisories for Windows Shell Information

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.

mediumCVE-2026-42906: Windows Shell Information Disclosure Vulnerabilitymsrc · 2026-06-09