High severity8.4NVD Advisory· Published May 12, 2026· Updated Jun 1, 2026

CVE-2026-40366

Description

Access of resource using incompatible type ('type confusion') in Microsoft Office Word allows an unauthorized attacker to execute code locally.

Microsoft/365 Apps2 versions
cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:*+ 1 more
- cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:*
- cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x86:*
Microsoft/Office2 versions
cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x64:*+ 1 more
- cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x64:*
- cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x86:*
Microsoft/Office Long Term Servicing Channel6 versions
cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:macos:*:*+ 5 more
- cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:macos:*:*
- cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:-:x64:*
- cpe:2.3:a:microsoft:office_long_term_servicing_channel:2021:*:*:*:*:-:x86:*
- cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:macos:*:*
- cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:-:x64:*
- cpe:2.3:a:microsoft:office_long_term_servicing_channel:2024:*:*:*:*:-:x86:*
Microsoft/Word2 versions
cpe:2.3:a:microsoft:word:2016:*:*:*:*:*:x64:*+ 1 more
- cpe:2.3:a:microsoft:word:2016:*:*:*:*:*:x64:*
- cpe:2.3:a:microsoft:word:2016:*:*:*:*:*:x86:*
Microsoft/Office Wordllm-fuzzy