CVE-2025-21345: CWE-416: Use After Free in Microsoft Microsoft 365 Apps for Enterprise
Microsoft Office Visio Remote Code Execution Vulnerability
AI Analysis
Technical Summary
CVE-2025-21345 is a use-after-free vulnerability (CWE-416) in Microsoft Office Visio component of Microsoft 365 Apps for Enterprise. Successful exploitation could allow an attacker to execute arbitrary code remotely. The vulnerability affects version 16.0.1 and has been assigned a CVSS v3.1 score of 7.8, indicating high severity. Microsoft has issued an official fix and manages remediation for this cloud-hosted service. No known active exploitation has been reported at this time.
Potential Impact
Exploitation of this vulnerability could result in remote code execution with high impact on confidentiality, integrity, and availability of the affected system. This could allow an attacker to run arbitrary code in the context of the user. However, there are no known exploits in the wild currently.
Mitigation Recommendations
An official fix is available from Microsoft. Since this is a cloud-hosted service, Microsoft manages remediation server-side. Users and administrators should consult the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21345 to ensure their environment is updated and protected.
CVE-2025-21345: CWE-416: Use After Free in Microsoft Microsoft 365 Apps for Enterprise
Description
Microsoft Office Visio Remote Code Execution Vulnerability
CVSS v3.1
Score 7.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2025-21345 is a use-after-free vulnerability (CWE-416) in Microsoft Office Visio component of Microsoft 365 Apps for Enterprise. Successful exploitation could allow an attacker to execute arbitrary code remotely. The vulnerability affects version 16.0.1 and has been assigned a CVSS v3.1 score of 7.8, indicating high severity. Microsoft has issued an official fix and manages remediation for this cloud-hosted service. No known active exploitation has been reported at this time.
Potential Impact
Exploitation of this vulnerability could result in remote code execution with high impact on confidentiality, integrity, and availability of the affected system. This could allow an attacker to run arbitrary code in the context of the user. However, there are no known exploits in the wild currently.
Mitigation Recommendations
An official fix is available from Microsoft. Since this is a cloud-hosted service, Microsoft manages remediation server-side. Users and administrators should consult the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21345 to ensure their environment is updated and protected.
Technical Details
- Data Version
- 5.1
- Assigner Short Name
- microsoft
- Date Reserved
- 2024-12-11T00:29:48.353Z
- 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-2025-21345","vendor":"Microsoft"}]
Threat ID: 68c0bd529ed239a66badebfd
Added to database: 09/09/2025, 23:50:42 UTC
Last enriched: 06/10/2026, 09:57:35 UTC
Last updated: 07/07/2026, 22:28:16 UTC
Views: 195
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