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Microsoft releases emergency patches for critical ASP.NET flaw

BACKGROUND
1 SIGNALFIRST DETECTED 22 April 2026
Narrative synthesis pending — 1 signal collected.
How the story developed
22 Apr
8.6
Other feeds and industry voices
22 Apr
Microsoft Patches Critical ASP.NET Core CVE-2026-40372 Privilege Escalation Bug

Microsoft has released out-of-band updates to address a security vulnerability in ASP.NET Core that could allow an attacker to escalate privileges. The vulnerability, tracked as

REPORT · WHO · The Hacker NewsOPEN STORY
22 Apr
Microsoft issues emergency update for macOS and Linux ASP.NET threat

When authentication fails, things can go very, very wrong.

REPORT · WHEN · Ars TechnicaOPEN STORY
13 Oct
Microsoft Patches More Than 1,400 Security Flaws

Microsoft today issued updates to fix more than 1,400 security vulnerabilities in its Windows operating systems and other software. Today's epic patch batch dwarfs September's

REPORT · WHEN · Krebs on SecurityOPEN STORY
15 May
Microsoft warns of Exchange zero-day flaw exploited in attacks

On Thursday, Microsoft shared mitigations for a high-severity Exchange Server vulnerability exploited in attacks that allow threat actors to execute arbitrary code via cross-site

REPORT · HOW · BleepingComputerOPEN STORY
Sources
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