CVE-2026-78524: Microsoft Office Remote Code Execution Vulnerability
Microsoft Office Remote Code Execution Vulnerability
Other sources
Out-of-bounds write in Microsoft Office allows an unauthorized attacker to execute code over a network.
— 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 16.0.5569.1000Patch KB5002916 - Upgrade
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Fixed in 16.0.20326.20138 - Upgrade
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Fixed in 16.0.14334.20906 - Upgrade
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Fixed in 16.0.10417.20207 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.112.26090911
Event History
Frequently Asked Questions
Which Office products are listed as affected?
The affected products listed are Microsoft Office 2016, Microsoft 365 Apps for Enterprise, Microsoft Office LTSC 2024 for 32-bit and 64-bit editions, Microsoft Office LTSC 2021 for 32-bit and 64-bit editions, Microsoft Office 2019 for 64-bit editions, and Microsoft Office 365 for Mac.
Does exploitation require prior authentication or user interaction?
The supplied severity vector indicates that no privileges are required and that user interaction is required. It also identifies the attack vector as network-based and the attack complexity as low.
What could a successful exploit allow?
A successful exploit could allow an unauthorized attacker to execute code. The supplied vector rates confidentiality, integrity, and availability impact as high.