CVE-2026-26110: CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') in Microsoft Microsoft 365 Apps for Enterprise
Access of resource using incompatible type ('type confusion') in Microsoft Office allows an unauthorized attacker to execute code locally.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-26110) involves a type confusion flaw (CWE-843) in Microsoft 365 Apps for Enterprise. It allows an attacker to execute code locally by accessing a resource using an incompatible type. The vulnerability has a CVSS 3.1 base score of 8.4, indicating high impact on confidentiality, integrity, and availability. Microsoft has released an official fix and manages remediation for this cloud service. No public exploits are currently known.
Potential Impact
Successful exploitation of this vulnerability could allow an unauthorized attacker to execute arbitrary code locally on the affected system, potentially leading to full compromise of confidentiality, integrity, and availability of the affected environment.
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 follow the guidance in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26110 to ensure their environments are updated and protected.
CVE-2026-26110: CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') in Microsoft Microsoft 365 Apps for Enterprise
Description
Access of resource using incompatible type ('type confusion') in Microsoft Office allows an unauthorized attacker to execute code locally.
CVSS v3.1
Score 8.4high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-26110) involves a type confusion flaw (CWE-843) in Microsoft 365 Apps for Enterprise. It allows an attacker to execute code locally by accessing a resource using an incompatible type. The vulnerability has a CVSS 3.1 base score of 8.4, indicating high impact on confidentiality, integrity, and availability. Microsoft has released an official fix and manages remediation for this cloud service. No public exploits are currently known.
Potential Impact
Successful exploitation of this vulnerability could allow an unauthorized attacker to execute arbitrary code locally on the affected system, potentially leading to full compromise of confidentiality, integrity, and availability of the affected environment.
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 follow the guidance in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26110 to ensure their environments are updated and protected.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-02-11T15:52:13.910Z
- 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-2026-26110","vendor":"Microsoft"}]
Threat ID: 69b05631ea502d3aa87d6b17
Added to database: 03/10/2026, 17:34:41 UTC
Last enriched: 06/19/2026, 20:30:06 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 506
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