Summary
Impact: Denial of Service. Microsoft rating: Important. Not known to be exploited — Exploitation Unlikely. Customer action: Required.
Details
Security updates
8.0.27 — https://support.microsoft.com/help/5093447
9.0.16 — https://support.microsoft.com/help/5093448
10.0.8 — https://support.microsoft.com/help/5093446
Vulnerabilities 1
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High 7.5
ASP.NET Core Denial of Service Vulnerability
Loop with unreachable exit condition ('infinite loop') in ASP.NET Core allows an unauthorized attacker to deny service over a network.
Revision history
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#1
Information published.
References
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CVE-2026-42899 ASP.NET Core Denial of Service Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42899
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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