CVE-2026-33115: CWE-416: Use After Free in Microsoft Microsoft 365 Apps for Enterprise
Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.
AI Analysis
Technical Summary
CVE-2026-33115 is a use-after-free vulnerability (CWE-416) in Microsoft Office Word component of Microsoft 365 Apps for Enterprise version 16.0.1. This vulnerability enables an unauthorized attacker to execute code locally by exploiting improper memory management. The CVSS 3.1 base score is 8.4, indicating high impact on confidentiality, integrity, and availability. Microsoft has published an official fix and manages remediation for this cloud-hosted service. No known active exploitation has been reported.
Potential Impact
Successful exploitation of this vulnerability could allow an unauthorized attacker to execute arbitrary code locally, potentially leading to full compromise of the affected system's confidentiality, integrity, and availability. Given the high CVSS score, the impact is significant if exploited.
Mitigation Recommendations
An official fix is available from Microsoft and should be applied promptly. Since this is a cloud-hosted service, Microsoft manages remediation server-side. Administrators and users should follow guidance in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33115 to ensure the fix is applied. There are no known exploits in the wild, but timely patching is recommended.
CVE-2026-33115: CWE-416: Use After Free in Microsoft Microsoft 365 Apps for Enterprise
Description
Use after free in Microsoft Office Word allows an unauthorized attacker to execute code locally.
CVSS v3.1
Score 8.4high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-33115 is a use-after-free vulnerability (CWE-416) in Microsoft Office Word component of Microsoft 365 Apps for Enterprise version 16.0.1. This vulnerability enables an unauthorized attacker to execute code locally by exploiting improper memory management. The CVSS 3.1 base score is 8.4, indicating high impact on confidentiality, integrity, and availability. Microsoft has published an official fix and manages remediation for this cloud-hosted service. No known active exploitation has been reported.
Potential Impact
Successful exploitation of this vulnerability could allow an unauthorized attacker to execute arbitrary code locally, potentially leading to full compromise of the affected system's confidentiality, integrity, and availability. Given the high CVSS score, the impact is significant if exploited.
Mitigation Recommendations
An official fix is available from Microsoft and should be applied promptly. Since this is a cloud-hosted service, Microsoft manages remediation server-side. Administrators and users should follow guidance in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33115 to ensure the fix is applied. There are no known exploits in the wild, but timely patching is recommended.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-03-17T20:15:23.721Z
- 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-2026-33115","vendor":"Microsoft"}]
Threat ID: 69de7a3a82d89c981fd6cf2c
Added to database: 4/14/2026, 5:32:42 PM
Last enriched: 5/19/2026, 10:51:28 AM
Last updated: 5/31/2026, 5:03:43 AM
Views: 103
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