CVE-2026-47290: CWE-416: Use After Free in Microsoft Microsoft 365 Apps for Enterprise
Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.
AI Analysis
Technical Summary
This vulnerability, identified as CVE-2026-47290 and classified under CWE-416 (Use After Free), affects Microsoft 365 Apps for Enterprise version 16.0.1. It allows an unauthorized attacker to execute code locally by exploiting a use-after-free condition in Microsoft Office. The vulnerability has a CVSS v3.1 base score of 7.8, indicating high severity, with attack vector local, low attack complexity, no privileges required, and user interaction required. Microsoft has published an official fix and manages remediation for this cloud service.
Potential Impact
Successful exploitation of this vulnerability could lead to local code execution with high impact on confidentiality, integrity, and availability. This means an attacker could run arbitrary code on the affected system, potentially leading to full compromise of the local environment.
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 version as per Microsoft's guidance in the advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47290.
CVE-2026-47290: CWE-416: Use After Free in Microsoft Microsoft 365 Apps for Enterprise
Description
Use after free in Microsoft Office allows an unauthorized attacker to execute code locally.
CVSS v3.1
Score 7.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CVE-2026-47290 and classified under CWE-416 (Use After Free), affects Microsoft 365 Apps for Enterprise version 16.0.1. It allows an unauthorized attacker to execute code locally by exploiting a use-after-free condition in Microsoft Office. The vulnerability has a CVSS v3.1 base score of 7.8, indicating high severity, with attack vector local, low attack complexity, no privileges required, and user interaction required. Microsoft has published an official fix and manages remediation for this cloud service.
Potential Impact
Successful exploitation of this vulnerability could lead to local code execution with high impact on confidentiality, integrity, and availability. This means an attacker could run arbitrary code on the affected system, potentially leading to full compromise of the local environment.
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 version as per Microsoft's guidance in the advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47290.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-05-18T23:53:33.896Z
- 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-2026-47290","vendor":"Microsoft"}]
Threat ID: 6a56768c68715ace43f08bbb
Added to database: 07/14/2026, 17:49:00 UTC
Last enriched: 08/13/2026, 14:16:40 UTC
Last updated: 08/28/2026, 22:52:11 UTC
Views: 96
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