Summary
Impact: Information Disclosure. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.
Details
What type of information could be disclosed by this vulnerability?
Successful exploitation could allow an application running in an AppContainer sandbox to read protected encrypted credential material outside the sandbox. Access to that encrypted material alone does not reveal plaintext passwords or allow decryption without additional secrets.
Security updates
10.0.26300.9974 — https://support.microsoft.com/help/5132061
10.0.26300.9911 — https://support.microsoft.com/help/5132043
10.0.17763.9487 — https://support.microsoft.com/help/5131085
10.0.20348.5870 — https://support.microsoft.com/help/5131090
10.0.19044.7846 — https://support.microsoft.com/help/5131096
10.0.26100.33822 — https://support.microsoft.com/help/5131080
10.0.26100.33730 — https://support.microsoft.com/help/5131077
10.0.22631.7711 — https://support.microsoft.com/help/5131087
10.0.28000.3501 — https://support.microsoft.com/help/5132059
10.0.14393.9688 — https://support.microsoft.com/help/5131291
Vulnerabilities 1
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Medium 6.5
Windows AppContainer Information Disclosure Vulnerability
Weak authentication in Windows AppContainer allows an authorized attacker to disclose information locally.
Revision history
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#1
Information published.
References
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CVE-2026-96018 Windows AppContainer Information Disclosure Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96018
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss