CVE-2026-100212: microsoft 365_apps, microsoft microsoft_365, microsoft office_2021

CVSS 8.8 (high) · published 2026-10-13

Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.

Affected products (NVD): microsoft 365_apps, microsoft microsoft_365, microsoft office_2021, microsoft office_2024, microsoft office_online_server

Fixed in (NVD): 16.0.10417.20228

Weakness: CWE-416

Source: NVD CVE-2026-100212

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-100212

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