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CVE-2026-21258
MEDIUM
CVSS: 5.5
Published: 2026-02-10
Modified: 2026-06-17
Description
Improper input validation 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
Weakness Type
CWE-20, CWE-125