CVE-2020-1229: Microsoft 365 Apps

Medium severity, CVSS 4.3. EPSS: 3.8% chance of exploitation in the next 30 days.

A security feature bypass vulnerability exists in Microsoft Outlook when Office fails to enforce security settings configured on a system, aka 'Microsoft Outlook Security Feature Bypass Vulnerability'.

Affected products

• Microsoft 365 Apps: affected versions not specified
• Microsoft Office: version 2010 only; version 2013 only; version 2016 only; version 2019 only
• Microsoft Word: version 2010 only; version 2013 only; version 2016 only

Published 2020-06-09. Last modified 2026-06-17.