CVE-2026-102856

Fix

Microsoft's update · Critical

• Release Notes — Microsoft 365 Apps for Enterprise for 32-bit Systems, Microsoft 365 Apps for Enterprise for 64-bit Systems · build https://aka.ms/OfficeSecurityReleases
• Release Notes — Microsoft Office LTSC 2021 for 32-bit editions, Microsoft Office LTSC 2021 for 64-bit editions · build 16.0.14334.20974
• Release Notes — Microsoft Office LTSC 2024 for 32-bit editions, Microsoft Office LTSC 2024 for 64-bit editions · build 16.0.17932.21056

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-2026-102856 Vendor Advisory

Vendor advisories in the News 1

• Microsoft October 2026 Security Updates: 1476 CVEs, 1 exploited, 96 critical Microsoft Security Update Guide · 2026-10-13

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.