← Database
CVE-2026-21259
HIGH
CVSS: 7.8
Published: 2026-02-10
Modified: 2026-06-17
Description
Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to elevate privileges locally.
Affected Platforms
Microsoft 365 AppsMicrosoft Office Online ServerMicrosoft Office Long Term Servicing ChannelMicrosoft ExcelMicrosoft Office
Weakness Type
CWE-122, CWE-787