CVE-2026-66806: Microsoft Office Word Information Disclosure Vulnerability
Microsoft Office Word Information Disclosure Vulnerability
Other sources
Off-by-one error 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 https://aka.ms/OfficeSecurityReleases - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 16.0.5565.1000Patch KB5002901
Event History
Frequently Asked Questions
What is the severity of CVE-2026-66806?
CVE-2026-66806 has a medium severity rating of 5.5.
How do I fix CVE-2026-66806?
To address CVE-2026-66806, ensure you apply the latest security updates provided by Microsoft for your version of Microsoft Word.
Which software is affected by CVE-2026-66806?
CVE-2026-66806 affects several versions including Microsoft Word 2016, Microsoft 365 Apps for Enterprise, Microsoft Office 2019, and Microsoft Office LTSC editions.
What type of vulnerability is CVE-2026-66806?
CVE-2026-66806 is classified as an information disclosure vulnerability due to an off-by-one error in Microsoft Office Word.
Can CVE-2026-66806 be exploited remotely?
CVE-2026-66806 requires local access, meaning it cannot be exploited remotely.