Microsoft Exchange Server Cross-Site Scripting Vulnerability

When

2026-05-15 00:00 UTC · day precision

Where

Global (internet)

Category

cyber_exploit

Microsoft Exchange Server contains a cross-site scripting vulnerability during web page generation in Outlook Web Access and when certain interaction conditions are met, arbitrary JavaScript can be executed in the browser context.

Sources

• CISA ↗ · first seen 2026-05-15 00:00 UTC

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Correlated events

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