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CVE-2026-49165: Microsoft Windows App Store Information Disclosure Vulnerability

highCVSS 7.1CVE-2026-49165
Use of uninitialized resource in Microsoft Windows App Store allows an authorized attacker to disclose information locally.

CSIRTS triage

vendor: Microsoftproduct: Windows App StoreInformation disclosure
What
An authorized attacker can disclose information locally due to the use of uninitialized resources.
Who is affected
Authorized users of Microsoft Windows App Store.
Urgency
Remediation is urgent due to the high severity and potential for information disclosure.
Action
Update to the latest version of Windows App Store.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
high — CVSS 7.1
Published
2026-07-14
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-49165

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-2026-49165coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

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

Recent advisories for Microsoft Windows App

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