Microsoft Office Information Disclosure Vulnerability

🔗 CVE IDs covered (1)

📋 Description

🎯 Affected products16

• Microsoft 365 Apps for Enterprise for 32-bit Systems
• Microsoft 365 Apps for Enterprise for 64-bit Systems
• Microsoft Office 2016 (32-bit edition)
• Microsoft Office 2016 (64-bit edition)
• Microsoft Office 2019 for 32-bit editions
• Microsoft Office 2019 for 64-bit editions
• Microsoft Office 365 for Mac
• Microsoft Office LTSC 2021 for 32-bit editions
• Microsoft Office LTSC 2021 for 64-bit editions
• Microsoft Office LTSC 2024 for 32-bit editions
• Microsoft Office LTSC 2024 for 64-bit editions
• Microsoft Office LTSC for Mac 2021
• Microsoft Office LTSC for Mac 2024
• Microsoft SharePoint Enterprise Server 2016
• Microsoft SharePoint Server 2019
• Microsoft SharePoint Server Subscription Edition

✅ Remediation

KBRelease Notes (Security Update) — fixed build 16.111.26071215 KB5002891 (Security Update) — fixed build 16.0.5561.1001 KB5002892 (Security Update) — fixed build 16.0.5561.1001 KB5002883 (Security Update) — fixed build 16.0.10417.20175 KB5002885 (Security Update) — fixed build 16.0.10417.20175 KBClick to Run (Security Update) — fixed build https://aka.ms/OfficeSecurityReleases KB5002882 (Security Update) — fixed build 16.0.19725.20434 KB5002887 (Security Update) — fixed build 16.0.5561.1000

🔗 References (16)

• advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55121
• patchhttps://www.microsoft.com/en-us/microsoft-365/mac/microsoft-365-for-mac?msockid=35f9adb0e74b61392038b90de6fe608c
• patchhttps://www.microsoft.com/en-us/download/details.aspx?id=108723
• referencehttps://support.microsoft.com/help/5002891
• patchhttps://www.microsoft.com/en-us/download/details.aspx?id=108724
• referencehttps://support.microsoft.com/help/5002892
• patchhttps://www.microsoft.com/en-us/download/details.aspx?id=108726
• referencehttps://support.microsoft.com/help/5002883
• patchhttps://www.microsoft.com/en-us/download/details.aspx?id=108722
• referencehttps://support.microsoft.com/help/5002885
• referencehttps://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates
• patchhttps://go.microsoft.com/fwlink/p/?linkid=831049
• patchhttps://www.microsoft.com/en-us/download/details.aspx?id=108730
• referencehttps://support.microsoft.com/help/5002882
• patchhttps://www.microsoft.com/en-us/download/details.aspx?id=108733
• referencehttps://support.microsoft.com/help/5002887