CVE-2025-59233

HIGH

Microsoft 365 Apps < 16.0.10417.20059 - Type Confusion

Title source: rule

Description

Access of resource using incompatible type ('type confusion') in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

References (1)

[Vendor Advisory] https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59233

Scores

CVSS v3 7.8

EPSS 0.0026

EPSS Percentile 49.4%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Classification

CWE

CWE-843

Status published

Affected Products (13)

microsoft/365_apps

microsoft/365_apps

microsoft/excel

microsoft/excel

microsoft/office

microsoft/office

microsoft/office_long_term_servicing_channel

microsoft/office_long_term_servicing_channel

microsoft/office_long_term_servicing_channel

microsoft/office_long_term_servicing_channel

microsoft/office_long_term_servicing_channel

microsoft/office_long_term_servicing_channel

microsoft/office_online_server < 16.0.10417.20059

Timeline

Published Oct 14, 2025

Tracked Since Feb 18, 2026