Jun 2026: Microsoft Outlook and Word Remote Code Execution Vulnerability
CVE-2026-45456 Published on June 9, 2026
Microsoft Outlook and Word Remote Code Execution Vulnerability
Access of resource using incompatible type ('type confusion') in Microsoft Office allows an unauthorized attacker to execute code locally.
Weakness Type
What is an Object Type Confusion Vulnerability?
The program allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.
CVE-2026-45456 has been classified to as an Object Type Confusion vulnerability or weakness.
Products Associated with CVE-2026-45456
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Affected Versions
Microsoft 365 Apps for Enterprise:- Version 16.0.1 and below https://aka.ms/OfficeSecurityReleases is affected.
- Version 19.0.0 and below https://aka.ms/OfficeSecurityReleases is affected.
- Version - is affected.
- Version 16.0.1 and below https://aka.ms/OfficeSecurityReleases is affected.
- Version 16.0.0 and below https://aka.ms/OfficeSecurityReleases is affected.
- Version - is affected.
- Version - is affected.
- Version 16.0.0 and below 16.0.5556.1005 is affected.
- Version 16.0.0 and below 16.0.10417.20153 is affected.
- Version 16.0.0 and below 16.0.19725.20384 is affected.
- Version 16.0.1 and below 16.0.5556.1000 is affected.