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CVE-2026-21511

Microsoft Outlook Spoofing Vulnerability PUBLISHED

Description (CNA)

No English CNA description was supplied.

Affected (CNA)

Vendor / product	Versions
Microsoft / Microsoft 365 Apps for Enterprise	affected 16.0.1 before https://aka.ms/OfficeSecurityReleases
Microsoft / Microsoft Office 2019	affected 19.0.0 before https://aka.ms/OfficeSecurityReleases
Microsoft / Microsoft Office LTSC 2021	affected 16.0.1 before https://aka.ms/OfficeSecurityReleases
Microsoft / Microsoft Office LTSC 2024	affected 16.0.0 before https://aka.ms/OfficeSecurityReleases
Microsoft / Microsoft Office LTSC for Mac 2021	affected 16.0.1 before 16.106.26020821
Microsoft / Microsoft Office LTSC for Mac 2024	affected 16.0.0 before 16.106.26020821
Microsoft / Microsoft SharePoint Enterprise Server 2016	affected 16.0.0 before 16.0.5539.1002
Microsoft / Microsoft SharePoint Server 2019	affected 16.0.0 before 16.0.10417.20097
Microsoft / Microsoft SharePoint Server Subscription Edition	affected 16.0.0 before 16.0.19127.20518
Microsoft / Microsoft Word 2016	affected 16.0.1 before 16.0.5539.1002

CWE

CWE-502

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21511

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.