Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.
Fix
Microsoft's update · Important
- KB5002928 — Office Online Server · build 16.0.10417.20228
- Release Notes — Microsoft Office 365 for Mac, Microsoft Office LTSC for Mac 2021, Microsoft Office LTSC for Mac 2024 · build 16.114.26101123
- Release Notes — Microsoft Office LTSC 2021 for 64-bit editions, Microsoft Office LTSC 2021 for 32-bit editions · build 16.0.14334.20974
- Release Notes — Microsoft Office LTSC 2024 for 64-bit editions, Microsoft Office LTSC 2024 for 32-bit editions · build 16.0.17932.21056
- Release Notes — Microsoft 365 Apps for Enterprise for 64-bit Systems, Microsoft 365 Apps for Enterprise for 32-bit Systems · build https://aka.ms/OfficeSecurityReleases
From the 2026-Oct release note of Microsoft's Security Update Guide, revised 2026-10-28 · Exploitation Less Likely.
Patch, vendor advisory and mitigation references on NVD 1
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97747 Patch, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 8.8 · microsoftNVD modified 2026-10-14 20:05
Affected (CPE criteria) 10
cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x64:*cpe:2.3:a:microsoft:365_apps:-:*:*:*:enterprise:*:x86:*cpe:2.3:a:microsoft:microsoft_365:-:*:*:*:*:macos:*:*cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x64:*cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:-:x86:*cpe:2.3:a:microsoft:office_2021:-:*:*:*:ltsc:macos:-:*cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x64:*cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:-:x86:*cpe:2.3:a:microsoft:office_2024:-:*:*:*:ltsc:macos:-:*cpe:2.3:a:microsoft:office_online_server:*:*:*:*:*:*:*:*
References 1
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97747 Patch, Vendor Advisory