Medium severity6.5NVD Advisory· Published Jul 14, 2026· Updated Jul 15, 2026

CVE-2026-55054

Description

Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information over a network.

Microsoft/Office Excelllm-fuzzy
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/Office8 versions
cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x64:*+ 7 more
- cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x64:*
- cpe:2.3:a:microsoft:office:2019:*:*:*:*:*:x86:*
- cpe:2.3:a:microsoft:office_2021:*:*:*:*:ltsc:macos:-:*range: <16.111.26071215
- cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x64:*
- cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x86:*
- cpe:2.3:a:microsoft:office_2024:*:*:*:*:ltsc:macos:-:*range: <16.111.26071215
- cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x64:*
- cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x86:*
Microsoft/Office Online Server
cpe:2.3:a:microsoft:office_online_server:*:*:*:*:*:*:*:*
Range: <16.0.10417.20175
Microsoft/Office 365
cpe:2.3:a:microsoft:office_365:*:*:*:*:-:*:*:*
Range: <16.111.26071215