com compatibility

The com compatibility tag covers discussions about Component Object Model (COM) and ActiveX security, particularly in the context of Microsoft Office vulnerabilities. Recent content focuses on CVE-2026-21509, a security-feature-bypass vulnerability that allows attackers to load or activate COM/ActiveX controls in Office. The tag includes guidance on applying registry kill bits as a mitigation measure while official patches are developed. Administrators and IT professionals will find practical steps for protecting systems against COM-based exploits, with emphasis on registry edits and Microsoft's recommended security configurations. The tag is relevant for those managing Office deployments and seeking to understand COM compatibility risks and mitigations.