CVE-2026-66809: Microsoft Office Graphics Component Information Disclosure Vulnerability
Microsoft Office Graphics Component Information Disclosure Vulnerability
Other sources
Out-of-bounds read in Microsoft Office 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 16.112.26081010 - 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-2026-66809?
CVE-2026-66809 has a medium severity rating of 5.5.
What does CVE-2026-66809 affect?
CVE-2026-66809 affects various Microsoft Office products including Microsoft Word 2016 and Microsoft 365 Apps for Enterprise.
What is the risk associated with CVE-2026-66809?
CVE-2026-66809 carries a risk score of 31, indicating a significant concern for information disclosure.
How can I fix CVE-2026-66809?
To mitigate CVE-2026-66809, ensure that you are using the latest updates for your affected Microsoft Office products.
What type of vulnerability is CVE-2026-66809?
CVE-2026-66809 is classified as an information disclosure vulnerability due to an out-of-bounds read in Microsoft Office.