Vulnerability record · CVE-2017-11937 · published 7 December 2017

CVE-2017-11937: Microsoft malware protection engine memory buffer overflow vulnerability

Microsoft · Malware Protection Engine

The Microsoft Malware Protection Engine running on Microsoft Forefront and Microsoft Defender on Windows 7 SP1, Windows 8.1, Windows RT 8.1, Windows 10 Gold, 1511, 1607, and 1703, 1709 and Windows Server 2016, Windows Server, version 1709, Microsoft Exchange Server 2013 and 2016, does not properly scan a specially crafted file leading to remote code execution. aka "Microsoft Malware Protection Engine Remote Code Execution Vulnerability".

7.8 CVSS 3.0 High EPSS 28% · top 1.9% CWE-119 · Memory buffer overflow

7.8CVSS 3.0 base score, v2 9.3

28%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

6References

17 Jun 2026Last modified by NVD

Description

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

Affected products

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

Malware Protection Engine Microsoft

References

Link	Tags
http://www.securityfocus.com/bid/102070	Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1039972	Third Party AdvisoryVDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11937	PatchVendor Advisory
http://www.securityfocus.com/bid/102070	Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1039972	Third Party AdvisoryVDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11937	PatchVendor Advisory

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Related vulnerabilities

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

7.8CVE-2026-41091Microsoft Defender link following allows local privilege elevationMicrosoft Defender's malware protection engine resolves links improperly before accessing files, a link-following flaw (CWE-59). A local attacker wit…KEVEPSS 0.44%analysed20 May 2026 7.8CVE-2017-8540Microsoft Malware Protection Engine out-of-bounds write via crafted fileThe Microsoft Malware Protection Engine, used by Windows Defender, Forefront, Security Essentials, System Center Endpoint Protection, Intune Endpoint…KEVEPSS 72%analysed26 May 2017 9.3CVE-2013-1346Microsoft malware protection engine memory buffer overflow vulnerabilitympengine.dll in Microsoft Malware Protection Engine before 1.1.9506.0 on x64 platforms allows remote attackers to execute arbitrary code or cause a d…EPSS 12%15 May 2013 9.3CVE-2006-5270Microsoft antigen vulnerabilityInteger overflow in the Microsoft Malware Protection Engine (mpengine.dll), as used by Windows Live OneCare, Antigen, Defender, and Forefront Securit…EPSS 30%13 Feb 2007 8.1CVE-2026-45584Microsoft malware protection engine heap-based buffer overflow vulnerabilityHeap-based buffer overflow in Microsoft Defender allows an unauthorized attacker to execute code over a network.EPSS 0.71%20 May 2026 7.8CVE-2026-69414Microsoft malware protection engine improper access control vulnerabilityMicrosoft is aware of an elevation of privilege in the Microsoft Malware Protection Engine in Microsoft Defender publicly referred to as "Shield…EPSS 0.33%14 Aug 2026 7.8CVE-2026-55012Microsoft malware protection engine heap-based buffer overflow vulnerabilityInteger overflow or wraparound in Microsoft Defender allows an unauthorized attacker to execute code locally.EPSS 0.47%14 Jul 2026 7.8CVE-2026-55011Microsoft malware protection engine vulnerabilityInteger underflow (wrap or wraparound) in Microsoft Defender allows an unauthorized attacker to execute code locally.EPSS 0.47%14 Jul 2026

Source: NIST National Vulnerability Database (record CVE-2017-11937), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.