CVE-2019-1266: Microsoft Exchange Server

Medium severity, CVSS 6.1. EPSS: 2% chance of exploitation in the next 30 days.

A spoofing vulnerability exists in Microsoft Exchange Server when Outlook Web App (OWA) fails to properly handle web requests, aka 'Microsoft Exchange Spoofing Vulnerability'.

Affected products

• Microsoft Exchange Server: version 2016 only; version 2019 only

Published 2019-09-11. Last modified 2026-06-17.