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CVE-2024-43465: Microsoft Excel Elevation of Privilege Vulnerability

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-09-10 · updated 2026-08-10
• Weakness: CWE-416

Description

Microsoft Excel Elevation of Privilege Vulnerability

Affected products

• Microsoft 365 Apps: all versions
• Microsoft Excel 2013 Service Pack 1: 2016
• Microsoft Office: 2019
• Microsoft Office LTSC for Mac 2021: 2021
• Microsoft Office Online Server: before 16.0.10414.20000 — fixed in 16.0.10414.20000
• Microsoft 365 Apps: from 16.0.1 before https://aka.ms/OfficeSecurityReleases — fixed in https://aka.ms/OfficeSecurityReleases
• Microsoft Excel 2016: from 16.0.0.0 before 16.0.5465.1001 — fixed in 16.0.5465.1001
• Microsoft Office LTSC 2021: from 16.0.1 before https://aka.ms/OfficeSecurityReleases — fixed in https://aka.ms/OfficeSecurityReleases
• Microsoft Office: from 19.0.0 before https://aka.ms/OfficeSecurityReleases — fixed in https://aka.ms/OfficeSecurityReleases
• Microsoft Office LTSC for Mac 2021: from 16.0.1 before 16.89.24090815 — fixed in 16.89.24090815
• Microsoft Office Online Server: from 16.0.1 before 16.0.10414.20000 — fixed in 16.0.10414.20000

How to fix

Upgrade to a fixed version: Microsoft Office Online Server 16.0.10414.20000; Microsoft 365 Apps https://aka.ms/OfficeSecurityReleases; Microsoft Excel 2016 16.0.5465.1001; Microsoft Office LTSC 2021 https://aka.ms/OfficeSecurityReleases; Microsoft Office https://aka.ms/OfficeSecurityReleases; Microsoft Office LTSC for Mac 2021 16.89.24090815; Microsoft Office Online Server 16.0.10414.20000. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-43465

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