Microsoft has published details on four critical vulnerabilities affecting Microsoft 365 Apps For Enterprise and related Office products. All four flaws carry CVSS scores of 9.8 and allow remote code execution over a network.
Correction (Oct 13): An earlier version said the four Microsoft 365 Apps CVEs carry maximum severity scores. They are rated 9.8 (critical) under CVSS 3.1 by Microsoft; the maximum is 10. The story also now lists affected products, including Windows versions for CVE-2026-70096.
CVE-2026-70096 stems from a heap-based buffer overflow in the Windows Rich Text Edit Control.
CVE-2026-70300 results from an untrusted pointer dereference in Microsoft Office Word.
Enterprises should prioritize these updates across all Office deployments given the network-based attack vector and critical severity.
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