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?
Exploiting this vulnerability could allow the disclosure of credentials.
According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?
Successful exploitation of this vulnerability requires an attacker to take additional actions prior to exploitation to prepare the target environment.
Security updates
10.0.13 — https://support.microsoft.com/help/5130036
8.0.32 — https://support.microsoft.com/help/5130034
9.0.21 — https://support.microsoft.com/help/5130035
11.0.0-rc.2 — https://github.com/dotnet/announcements/issues/482
18.10.4 — https://learn.microsoft.com/en-us/visualstudio/releases/2026/release-notes
17.14.42 — https://learn.microsoft.com/en-us/visualstudio/releases/2022/release-notes
Vulnerabilities 1
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Medium 5.3
.NET Information Disclosure Vulnerability
Origin validation error in .NET allows an unauthorized attacker to disclose information over a network.
Revision history
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#4
Updated an acknowledgement. This is an informational change only.
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#3
Updated an acknowledgement. This is an informational change only.
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#2
Updated the Security Updates table to add KB article links for .NET 11.0 and download and KB article links for Microsoft Visual Studio. This is an informational change only; the fixed builds are unchanged.
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#1
Information published.
References
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CVE-2026-96234 .NET Information Disclosure Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96234
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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