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OpenAdvisories
Medium · 5.5 CVE-2026-66809 EUVD-2026-56752GHSA-fc76-3hc4-hv86

Microsoft Office Graphics Component Information Disclosure Vulnerability

Published Aug 11, 2026 · Updated Nov 10, 2026 · Assigned by microsoft

Description

Out-of-bounds read in Microsoft Office allows an unauthorized attacker to disclose information locally.

Affected products

VendorProductAffectedFixed
Microsoft Microsoft 365 Apps for Enterprise 16.0.1 – < https://aka.ms/OfficeSecurityReleases https://aka.ms/OfficeSecurityReleases
Microsoft Microsoft Office 2019 19.0.0 – < https://aka.ms/OfficeSecurityReleases https://aka.ms/OfficeSecurityReleases
Microsoft Microsoft Office 365 for Mac 1.0.0 – < 16.112.26081010 16.112.26081010
Microsoft Microsoft Office LTSC 2021 16.0.1 – < https://aka.ms/OfficeSecurityReleases https://aka.ms/OfficeSecurityReleases
Microsoft Microsoft Office LTSC 2024 16.0.0 – < https://aka.ms/OfficeSecurityReleases https://aka.ms/OfficeSecurityReleases
Microsoft Microsoft Office LTSC for Mac 2021 16.0.1 – < 16.112.26081010 16.112.26081010
Microsoft Microsoft Office LTSC for Mac 2024 16.0.0 – < 16.112.26081010 16.112.26081010
Microsoft Microsoft Word 2016 16.0.1 – < 16.0.5565.1000 16.0.5565.1000

Advisories 3

References