CVE-2026-88144: CWE-416: Use After Free in Microsoft Microsoft 365 Apps for Enterprise
Description
CVE-2026-88144 is a use-after-free vulnerability in Microsoft Office PowerPoint within Microsoft 365 Apps for Enterprise. It allows an unauthorized attacker to execute code remotely over a network. The vulnerability has a high severity with a CVSS score of 8.8. An official fix is available from Microsoft, and the vendor manages remediation for this cloud-hosted service. No known exploits are reported in the wild at this time.
CVSS v3.1
Score 8.8high
Affected software
Microsoft
Microsoft 365 Apps for Enterprise
Microsoft
Microsoft Office 365 for Mac
Microsoft
Microsoft Office LTSC 2021
Microsoft
Microsoft Office LTSC 2024
Microsoft
Microsoft Office LTSC for Mac 2021
Microsoft
Microsoft Office LTSC for Mac 2024
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-88144) involves a use-after-free condition in Microsoft Office PowerPoint, part of Microsoft 365 Apps for Enterprise. Exploitation could allow an attacker to execute arbitrary code remotely without privileges, requiring user interaction. The CVSS 3.1 base score is 8.8, reflecting high impact on confidentiality, integrity, and availability. Microsoft has published an official fix and manages remediation for this cloud service. The affected versions include multiple builds around 16.0.0 and 16.0.1 up to but not including fixed builds 16.0.14334.20974 and 16.0.17932.21056.
Potential Impact
Successful exploitation could lead to remote code execution with high impact on system confidentiality, integrity, and availability. The vulnerability requires no privileges but does require user interaction. This could allow an attacker to run arbitrary code in the context of the affected application.
Mitigation Recommendations
An official fix is available from Microsoft. Since this is a cloud-hosted service, Microsoft manages the remediation server-side. Users and administrators should ensure their Microsoft 365 Apps for Enterprise are updated to the fixed versions as per the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88144.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-09-09T21:53:00.398Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Is Cloud Service
- true
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88144","vendor":"Microsoft"}]
Threat ID: 6ace855f2cdf04f6569ff907
Added to database: 10/13/2026, 19:24:15 UTC
Last enriched: 10/14/2026, 01:34:19 UTC
Last updated: 10/14/2026, 01:34:19 UTC
Views: 2
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