Description
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.
Recommended action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA remediation due date for U.S. federal agencies: 29 May 2026.
Collected automatically from public sources. Verify affected versions and fixes in the vendor's notice before acting.