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Vulnerability record · CVE-2017-8691 · published 8 August 2017

CVE-2017-8691: Microsoft windows 7 memory buffer overflow vulnerability

Microsoft · Windows 7

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."

8.8 CVSS 3.0 High EPSS 20% · top 2.7% CWE-119 · Memory buffer overflow
8.8CVSS 3.0 base score, v2 9.3
20%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

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."

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/100090 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1039096 Third Party AdvisoryVDB Entry
https://fortiguard.com/zeroday/FG-VD-17-142
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8691 PatchVendor Advisory
http://www.securityfocus.com/bid/100090 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1039096 Third Party AdvisoryVDB Entry
https://fortiguard.com/zeroday/FG-VD-17-142
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8691 PatchVendor Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2017-8691), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.