Summary
Impact: Denial of Service. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.
Details
Security updates
10.0.10 — https://support.microsoft.com/kb/5104034
8.0.29 — https://support.microsoft.com/kb/5104032
9.0.18 — https://support.microsoft.com/kb/5104033
Vulnerabilities 1
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High 7.5
ASP.NET Core Denial of Service Vulnerability
Allocation of resources without limits or throttling 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-2026-56170 ASP.NET Core Denial of Service Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56170
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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