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Microsoft patches critical Exchange Server zero-day vulnerability

Newsroom - 10 June 2026 - 16:44

Microsoft has patched an actively exploited Exchange Server vulnerability that allows threat actors to execute arbitrary JavaScript code in cross-site scripting (XSS) attacks targeting Outlook Web Access users.

Microsoft patches critical Exchange Server zero-day vulnerability
Microsoft has patched an actively exploited Exchange Server vulnerability that allows threat actors to execute arbitrary JavaScript code in cross-site scripting (XSS) attacks targeting Outlook Web Access users.
Microsoft Exchange Server zero-day XSS attacks

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