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CVE-2026-57084: Windows File Explorer Information Disclosure Vulnerability

mediumCVSS 5.5CVE-2026-57084
Use of uninitialized resource in Windows File Explorer allows an unauthorized attacker to disclose information locally.

CSIRTS triage

vendor: Microsoftproduct: Windows File ExplorerInformation disclosure
What
Use of uninitialized resource in Windows File Explorer allows an unauthorized attacker to disclose information locally.
Who is affected
Users of Windows File Explorer are affected.
Urgency
Remediation is medium urgency due to the potential for information disclosure.
Action
Update to the latest version of Windows File Explorer.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
medium — CVSS 5.5
Published
2026-07-14
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-57084

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-2026-57084coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Windows File Explorer

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