CVE-2026-40361: 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-2026-40361 is a use-after-free vulnerability (CWE-416) in Microsoft Office Word as part of Microsoft 365 Apps for Enterprise version 16.0.1. This vulnerability enables an unauthorized attacker to execute arbitrary code locally by exploiting improper memory management. The CVSS v3.1 base score is 8.4, indicating high impact on confidentiality, integrity, and availability. Microsoft has issued 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 attacker to execute arbitrary code locally, potentially leading to full compromise of the affected system's confidentiality, integrity, and availability. However, there are currently no known exploits in the wild.
Mitigation Recommendations
An official fix is available from Microsoft. Since this is a cloud-hosted service, Microsoft manages the remediation process. Users and administrators should ensure their Microsoft 365 Apps for Enterprise environment is updated according to Microsoft's guidance available at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40361.
CVE-2026-40361: 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.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-40361 is a use-after-free vulnerability (CWE-416) in Microsoft Office Word as part of Microsoft 365 Apps for Enterprise version 16.0.1. This vulnerability enables an unauthorized attacker to execute arbitrary code locally by exploiting improper memory management. The CVSS v3.1 base score is 8.4, indicating high impact on confidentiality, integrity, and availability. Microsoft has issued 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 attacker to execute arbitrary code locally, potentially leading to full compromise of the affected system's confidentiality, integrity, and availability. However, there are currently no known exploits in the wild.
Mitigation Recommendations
An official fix is available from Microsoft. Since this is a cloud-hosted service, Microsoft manages the remediation process. Users and administrators should ensure their Microsoft 365 Apps for Enterprise environment is updated according to Microsoft's guidance available at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40361.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-04-11T23:06:15.614Z
- 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-2026-40361","vendor":"Microsoft"}]
Threat ID: 6a03654ccbff5d861008c824
Added to database: 5/12/2026, 5:37:16 PM
Last enriched: 5/12/2026, 6:53:47 PM
Last updated: 5/13/2026, 4:47:45 AM
Views: 2
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