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Vulnerability record · CVE-2014-2779 · published 18 June 2014

CVE-2014-2779: Microsoft malware protection engine improper input validation vulnerability

Microsoft · Malware Protection Engine

mpengine.dll in Microsoft Malware Protection Engine before 1.1.10701.0 allows remote attackers to cause a denial of service (system hang) via a crafted file.

4.3 CVSS 2.0 Medium EPSS 13% · top 3.7% CWE-20 · Improper input validation
4.3CVSS 2.0 base score
13%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

mpengine.dll in Microsoft Malware Protection Engine before 1.1.10701.0 allows remote attackers to cause a denial of service (system hang) via a crafted file.

AV:N/AC:M/Au:N/C:N/I:N/A:P

Affected products

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

References

LinkTags
http://secunia.com/advisories/59337
http://www.securityfocus.com/bid/68076 VDB Entry
http://www.securitytracker.com/id/1030438 VDB Entry
https://technet.microsoft.com/library/security/2974294 MitigationPatchVendor Advisory
http://secunia.com/advisories/59337
http://www.securityfocus.com/bid/68076 VDB Entry
http://www.securitytracker.com/id/1030438 VDB Entry
https://technet.microsoft.com/library/security/2974294 MitigationPatchVendor 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%analysed7.8CVE-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%analysed9.3CVE-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%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%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%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%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%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%

Source: NIST National Vulnerability Database (record CVE-2014-2779), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.