CVE-2026-70300: Microsoft 365 Apps

Critical severity, CVSS 9.8. EPSS: 1% chance of exploitation in the next 30 days.

Untrusted pointer dereference in Microsoft Office Word allows an unauthorized attacker to execute code over a network.

Affected products

• Microsoft 365 Apps: affected versions not specified
• Microsoft Office 2021: affected versions not specified
• Microsoft Office 2024: affected versions not specified

Published 2026-10-13. Last modified 2026-10-14.