CVE-2019-0817: Microsoft Exchange Server

Medium severity, CVSS 5.4. EPSS: 2.3% chance of exploitation in the next 30 days.

A spoofing vulnerability exists in Microsoft Exchange Server when Outlook Web Access (OWA) fails to properly handle web requests, aka 'Microsoft Exchange Spoofing Vulnerability'. This CVE ID is unique from CVE-2019-0858.

Affected products

• Microsoft Exchange Server: version 2010 only; version 2013 only; version 2016 only; version 2019 only

Published 2019-04-09. Last modified 2026-06-17.