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#4 SecurityWeek general June 11, 2026 at 06:52 UTC

Microsoft Patches Exploited Exchange Server Vulnerability

By Eduard Kovacs

AI Summary

Microsoft patched CVE-2026-42897, a zero-day vulnerability in Exchange Server that had been under active attack since at least May 14 when Microsoft first warned customers. The June 2026 Patch Tuesday was reported as Microsoft's largest on record, with the company attributing increased vulnerability discovery volume in part to AI-assisted research. Exchange Server administrators should prioritize this patch given the server's role as a high-value target.

Read full article → https://www.securityweek.com/microsoft-patches-exp…

Relevance score: 85.0/100

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