Summary
Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.
Details
How could an attacker exploit this vulnerability?
An authenticated attacker could convince a privileged user to follow a specially crafted link to an affected application. Successful exploitation could allow the attacker to perform actions with that user's application privileges.
Security updates
1.2.14 — https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-114146
8.0.34 — https://support.microsoft.com/help/5135243
9.0.23 — https://support.microsoft.com/help/5135242
10.0.15 — https://support.microsoft.com/help/5135241
11.0.0 — https://github.com/dotnet/core/blob/main/release-notes/11.0/11.0.0/11.0.0.md
17.14.45 — https://learn.microsoft.com/en-us/visualstudio/releases/2022/release-notes
18.11.4 — https://learn.microsoft.com/en-us/visualstudio/releases/2026/release-notes
Vulnerabilities 1
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Critical 9.0
ASP.NET Core Elevation of Privilege Vulnerability
Incorrect authorization in ASP.NET Core allows an authorized attacker to elevate privileges over a network.
Revision history
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#2
Changes made to the security updates links and information. This is an informational change only.
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#1
Information published.
References
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CVE-2026-114146 ASP.NET Core Elevation of Privilege Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-114146
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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