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Vulnerability record · CVE-2017-8539 · published 26 May 2017

CVE-2017-8539: Microsoft forefront security memory buffer overflow vulnerability

Microsoft · Forefront Security

The Microsoft Malware Protection Engine running on Microsoft Forefront and Microsoft Defender on Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016, Microsoft Exchange Server 2013 and 2016, does not properly scan a specially crafted file leading to denial of service. aka "Microsoft Malware Protection Engine Denial of Service Vulnerability", a different vulnerability than CVE-2017-8535, CVE-2017-8536, CVE-2017-8537, and CVE-2017-8542.

5.5 CVSS 3.0 Medium EPSS 6.0% · top 6.9% CWE-119 · Memory buffer overflowCWE-369 · Divide by zero
5.5CVSS 3.0 base score, v2 4.3
6.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

The Microsoft Malware Protection Engine running on Microsoft Forefront and Microsoft Defender on Microsoft Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703, and Windows Server 2016, Microsoft Exchange Server 2013 and 2016, does not properly scan a specially crafted file leading to denial of service. aka "Microsoft Malware Protection Engine Denial of Service Vulnerability", a different vulnerability than CVE-2017-8535, CVE-2017-8536, CVE-2017-8537, and CVE-2017-8542.

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

Affected products

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

References

LinkTags
http://www.securityfocus.com/bid/98704 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1038571
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8539 Vendor Advisory
http://www.securityfocus.com/bid/98704 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1038571
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-8539 Vendor Advisory

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Related vulnerabilities

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

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Source: NIST National Vulnerability Database (record CVE-2017-8539), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.