CVE-2026-78510: Microsoft Office Remote Code Execution Vulnerability
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
Other sources
Microsoft Outlook and Word Remote Code Execution Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.17932.20976 - Upgrade
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Fixed in 16.0.14334.20906 - Upgrade
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Fixed in 16.0.20326.20138 - Upgrade
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Fixed in 16.0.5569.1000Patch KB5002916 - Upgrade
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Fixed in 16.113.26091433 - Upgrade
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Fixed in 16.0.10417.20207
Event History
Frequently Asked Questions
Which Microsoft Office deployments should be treated as potentially affected?
The affected software list includes Microsoft Office 2016; Microsoft 365 Apps for Enterprise; Office LTSC 2021 and 2024 in both 32-bit and 64-bit editions; Office 365 for Mac; and Office LTSC for Mac 2024.
Does exploitation require authentication, elevated privileges, or user interaction?
The supplied CVSS vector indicates network attackability with low attack complexity and no required privileges or user interaction. The description also identifies the attacker as unauthorized.
Does the provided information identify a specific fixed version or workaround?
No fixed build, update package, workaround, or mitigation is provided in the available data. The listed Microsoft reference is the only remediation-related source supplied.