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CVE-2026-21261
MEDIUM
CVSS: 5.5
Published: 2026-02-10
Modified: 2026-06-17
Description
Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to disclose information locally.
Affected Platforms
Microsoft 365 AppsMicrosoft Office Online ServerMicrosoft Office Long Term Servicing ChannelMicrosoft ExcelMicrosoft Office