CVE-2017-8691: Microsoft Windows 7

High severity, CVSS 8.8. EPSS: 19.8% chance of exploitation in the next 30 days.

Windows Server 2008 SP2 and R2 SP1, and Windows 7 SP1 allow an attacker to execute code remotely on a target system when the Windows font library fails to properly handle specially crafted embedded fonts, aka "Express Compressed Fonts Remote Code Execution Vulnerability."

Affected products

• Microsoft Windows 7: any version
• Microsoft Windows Server 2008: any version; version r2 only

Published 2017-08-08. Last modified 2026-06-17.