CVE-2026-63531: 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 locally.
— 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 16.0.5565.1000Patch KB5002901 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.112.26081010 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in https://aka.ms/OfficeSecurityReleases
Event History
Frequently Asked Questions
What is the severity of CVE-2026-63531?
CVE-2026-63531 has a medium severity score of 5.5.
How do I fix CVE-2026-63531?
To fix CVE-2026-63531, ensure that you apply the latest security updates provided by Microsoft for affected Microsoft Office products.
What type of vulnerability is CVE-2026-63531?
CVE-2026-63531 is an information disclosure vulnerability due to an out-of-bounds read in Microsoft Office Word.
Which versions of Microsoft products are affected by CVE-2026-63531?
CVE-2026-63531 affects Microsoft Word 2016, Microsoft 365 Apps for Enterprise, and various editions of Microsoft Office LTSC 2021 and 2024.
What can an attacker achieve with CVE-2026-63531?
An unauthorized attacker can disclose sensitive information locally due to CVE-2026-63531.