Microsoft Outlook Spoofing Vulnerability

🔗 CVE IDs covered (1)

📋 Description

🎯 Affected products15

• Microsoft 365 Apps for Enterprise for 32-bit Systems
• Microsoft 365 Apps for Enterprise for 64-bit Systems
• Microsoft Office 2019 for 32-bit editions
• Microsoft Office 2019 for 64-bit editions
• 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
• Microsoft Word 2016 (32-bit edition)
• Microsoft Word 2016 (64-bit edition)

✅ Remediation

KB5002841 (Security Update) — fixed build 16.0.5539.1002 KB5002840 (Security Update) — fixed build 16.0.5539.1002 KB5002834 (Security Update) — fixed build 16.0.10417.20097 KB5002836 (Security Update) — fixed build 16.0.10417.20097 KBClick to Run (Security Update) — fixed build https://aka.ms/OfficeSecurityReleases KBRelease Notes (Security Update) — fixed build 16.106.26020821 KB5002833 (Security Update) — fixed build 16.0.19127.20518 KB5002839 (Security Update) — fixed build 16.0.5539.1002

🔗 References (15)

• advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21511
• patchhttps://www.microsoft.com/en-us/download/details.aspx?id=108550
• referencehttps://support.microsoft.com/help/5002841
• patchhttps://www.microsoft.com/en-us/download/details.aspx?id=108553
• referencehttps://support.microsoft.com/help/5002840
• patchhttps://www.microsoft.com/en-us/download/details.aspx?id=108549
• referencehttps://support.microsoft.com/help/5002834
• patchhttps://www.microsoft.com/en-us/download/details.aspx?id=108552
• referencehttps://support.microsoft.com/help/5002836
• 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=108554
• referencehttps://support.microsoft.com/help/5002833
• patchhttps://www.microsoft.com/en-us/download/details.aspx?id=108548
• referencehttps://support.microsoft.com/help/5002839