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CVE-2025-59243

HighCVSS 7.8/10Last modified Oct 18, 2026

Description

Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness enumeration

Affected software

Vendor	Product	Versions
Microsoft	Microsoft 365 Apps for Enterprise	>= 16.0.1, < https://aka.ms/OfficeSecurityReleases
Microsoft	Microsoft Office LTSC 2021	>= 16.0.1, < https://aka.ms/OfficeSecurityReleases
Microsoft	Microsoft Office LTSC 2024	>= 16.0.0, < https://aka.ms/OfficeSecurityReleases

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59243Vendor Advisory

Timeline

Published: Oct 14, 2025
Last modified: Oct 18, 2026
NVD status: Analyzed

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CVE-2025-59243: High severity, CVSS 7.8 | Vulnix