CVE-2026-100212: Microsoft 365 Apps for Enterprise 16.0.1 to before https://aka.ms/OfficeSecurityReleases; +6 more affected products

Affected technology

Microsoft 365 Apps for Enterprise · 16.0.1 to before https://aka.ms/OfficeSecurityReleases
Microsoft

Microsoft Office 365 for Mac · 1.0.0 to before publication
Microsoft

Microsoft Office LTSC 2021 · 16.0.1 to before 16.0.14334.20974
Microsoft

Microsoft Office LTSC 2024 · 16.0.0 to before 16.0.17932.21056
Microsoft

Microsoft Office LTSC for Mac 2021 · 16.0.1 to before publication
Microsoft

Microsoft Office LTSC for Mac 2024 · 16.0.0 to before publication
Microsoft

Office Online Server · 16.0.0.0 to before 16.0.10417.20228
Microsoft

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · No privileges required · User interaction required

What an attacker can do

The source says use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network. Vendor/CNA’s CVSS 3.1 assessment (base score 8.8/10) rates confidentiality, integrity and availability impact as high.