High severity7.8NVD Advisory· Published May 12, 2026· Updated May 19, 2026

CVE-2026-40359

Description

Use after free in Microsoft Office Excel 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/Excel2 versions
cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:x64:*+ 1 more
- cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*:x64:*
- cpe:2.3:a:microsoft:excel:2016:*:*:*:*:*: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/Office Online Server
cpe:2.3:a:microsoft:office_online_server:*:*:*:*:*:*:*:*
Range: <16.0.10417.20128
Microsoft/Office Excelllm-fuzzy