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Microsoft .NET 0-Day Vulnerability Triggers Denial-of-Service Risk

Microsoft .NET 0-Day Vulnerability Triggers Denial-of-Service Risk

First seen 11 Mar 2026, 09:26 UTC • •

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ThreatCluster AI
ThreatCluster •March 12, 2026 at 16:10 UTC

A newly disclosed vulnerability in the Microsoft .NET Framework, tracked as CVE-2026-26127, allows unauthenticated remote attackers to cause a Denial-of-Service (DoS) condition on affected systems. Microsoft has classified this vulnerability as 'Important' with a CVSS score of 7.5, affecting multiple versions of .NET across Windows environments. An emergency security update was released on March 10, 2026, to mitigate this risk.

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Timeline

2026-03-10
CVE-2026-26127 published
2026-03-11
Emergency security update released

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