CVE-2018-8150: A security feature bypass vulnerability exists when the Microsoft Outlook attachment block filter does not...

Security readout for executives and security teams

This CVE describes a Microsoft Outlook protection bypass where the attachment block filter could mishandle attachments. In practical terms, an Outlook safety control may not block something it should. The provided sources identify Microsoft Office 2016 Click-to-Run 32-bit and 64-bit editions, but they do not provide CVSS, impact detail, or confirmed exploitation. Exposure appears limited to environments running the listed Microsoft Office 2016 Click-to-Run editions with Outlook use. Organizations that no longer run Office 2016 C2R or have fully migrated to supported Office versions are less likely to be exposed, but should verify asset inventory and update status. Handle as a verification and hygiene item unless internal scans show affected Outlook clients remain in use. Business urgency rises for organizations with legacy Office 2016 endpoints processing external attachments, because the issue weakens an email attachment safety control. Mitigation focus: Review Microsoft’s CVE-2018-8150 advisory for vendor-provided update guidance.; Confirm affected Office 2016 Click-to-Run installations are current.; Prioritize Outlook clients handling external email attachments..

Prepared

Jun 7, 2026, 13:40 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.