What happened
Access of resource using incompatible type ('type confusion') in Microsoft Office allows an unauthorized attacker to execute code locally.
Affected versions
Microsoft 365 Apps for Enterprise: 16.0.1 through before https://aka.ms/OfficeSecurityReleases (custom); 16.0.0 through before 16.0.5530.1001 (custom); 19.0.0 through before https://aka.ms/OfficeSecurityReleases (custom); 16.0.1 through before 16.0.19530.20000 (custom); 16.0.0 through before https://aka.ms/OfficeSecurityReleases (custom); 16.0.1 through before 16.104.25121423 (custom); 16.0.0 through before 16.104.25121423 (custom) Fixed: See vendor advisory.
Why it matters
Review the vendor advisory and exposure of the affected product to determine operational impact.
Detection & mitigation
- Apply vendor-provided updates or mitigations.
- Review affected product exposure and access logs.
Public PoC references
No public PoC reference has passed the current publication threshold.