CVE-2026-78522: 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
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.17932.20960 - Upgrade
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Fixed in 16.0.10417.20204 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.20326.20136 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.14334.20896
Event History
Frequently Asked Questions
What must an attacker do to exploit this issue?
The attack vector is network-based, requires no attacker privileges, and requires user interaction. The provided data does not specify the exact interaction or delivery method.
Which deployments are identified as affected?
The affected software list includes Word 2016, Microsoft 365 Apps for Enterprise, Microsoft Office Word, Office 2019 for 32-bit and 64-bit editions, Office LTSC 2021 for 32-bit editions, and Office LTSC 2024 for 32-bit and 64-bit editions.
What is the expected impact if exploitation succeeds?
Successful exploitation can disclose information. The supplied severity vector indicates high confidentiality impact, with no indicated integrity or availability impact.