CVE-2026-78502: Microsoft Office Word Information Disclosure Vulnerability
Microsoft Office Word Information Disclosure Vulnerability
Other sources
Out-of-bounds read in Microsoft Office Word allows an unauthorized attacker to disclose information 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 16.0.5569.1000Patch KB5002923 - Upgrade
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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 16.0.10417.20207 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.113.26091433
Event History
Frequently Asked Questions
What must an attacker do to exploit this issue?
The attacker must cause a user to interact with malicious content; the available scoring data indicates user interaction is required. No attacker privileges are required, and the attack can be conducted over a network.
What is the expected impact if exploitation succeeds?
Successful exploitation can disclose information from Word through an out-of-bounds read. The provided impact data indicates high confidentiality impact, with no indicated integrity or availability impact.
Which Word product families are listed as affected?
The affected software list includes Word 2016, Microsoft 365 Apps for Enterprise, Office 365 for Mac, Office LTSC for Mac 2024, and Office LTSC 2021 and 2024 for both 32-bit and 64-bit editions where listed.