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CVE-2026-40363
HIGH
CVSS: 8.4
Published: 2026-05-12
Modified: 2026-06-17
Description
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
Affected Platforms
Microsoft 365 CopilotMicrosoft Office Long Term Servicing ChannelMicrosoft 365 AppsMicrosoft Office