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CVE-2023-33148: Microsoft Office Elevation of Privilege Vulnerability

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2023-07-11 · updated 2026-06-17
• Weakness: CWE-59

Description

Microsoft Office Elevation of Privilege Vulnerability

Affected products

• Microsoft 365 Apps: all versions
• Microsoft Office: 2013, 2019
• Microsoft Office LTSC for Mac 2021: 2021
• Microsoft 365 Apps: from 16.0.1 before https://aka.ms/OfficeSecurityReleases — fixed in https://aka.ms/OfficeSecurityReleases
• Microsoft Office 2013 Click-to-Run (C2R): from 15.0.0.0 before 15.0.5571.1000 — fixed in 15.0.5571.1000
• 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

How to fix

Upgrade to a fixed version: Microsoft 365 Apps https://aka.ms/OfficeSecurityReleases; Microsoft Office 2013 Click-to-Run (C2R) 15.0.5571.1000; Microsoft Office LTSC 2021 https://aka.ms/OfficeSecurityReleases; Microsoft Office https://aka.ms/OfficeSecurityReleases. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-33148
• http://packetstormsecurity.com/files/173591/Microsoft-Office-365-18.2305.1222.0-Remote-Code-Execution.html
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-33148
• https://packetstorm.news/files/id/173591

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