Microsoft Malware Protection Engine vulnerabilities

CVE-2017-8540 [HIGH] CVE-2017-8540: The Microsoft Malware Protection Engine running on Microsoft Forefront and Microsoft Defender on Mic 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 cra

CVE-2026-41091 [HIGH] CWE-59 CVE-2026-41091: Improper link resolution before file access ('link following') in Microsoft Defender allows an autho Improper link resolution before file access ('link following') in Microsoft Defender allows an authorized attacker to elevate privileges locally.

CVE-2021-42298 [HIGH] CWE-94 CVE-2021-42298: Microsoft Defender Remote Code Execution Vulnerability Microsoft Defender Remote Code Execution Vulnerability

CVE-2017-0290 [HIGH] CWE-119 CVE-2017-0290: The Microsoft Malware Protection Engine running on Microsoft Forefront and Microsoft Defender on Mic 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 does not properly scan a specially crafted file leading to memory corrup

CVE-2017-8541 [HIGH] CVE-2017-8541: The Microsoft Malware Protection Engine running on Microsoft Forefront and Microsoft Defender on Mic 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 cra

CVE-2017-8538 [HIGH] CWE-119 CVE-2017-8538: The Microsoft Malware Protection Engine running on Microsoft Forefront and Microsoft Defender on Mic 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 speci

CVE-2021-31985 [HIGH] CVE-2021-31985: Microsoft Defender Remote Code Execution Vulnerability Microsoft Defender Remote Code Execution Vulnerability

CVE-2017-11937 [HIGH] CWE-119 CVE-2017-11937: The Microsoft Malware Protection Engine running on Microsoft Forefront and Microsoft Defender on Win 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 e

CVE-2026-45584 [HIGH] CWE-122 CVE-2026-45584: Heap-based buffer overflow in Microsoft Defender allows an unauthorized attacker to execute code ove Heap-based buffer overflow in Microsoft Defender allows an unauthorized attacker to execute code over a network.

CVE-2017-11940 [HIGH] CVE-2017-11940: The Microsoft Malware Protection Engine running on Microsoft Forefront and Microsoft Defender on Win 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

CVE-2013-1346 [CRITICAL] CWE-119 CVE-2013-1346: mpengine.dll in Microsoft Malware Protection Engine before 1.1.9506.0 on x64 platforms allows remote mpengine.dll in Microsoft Malware Protection Engine before 1.1.9506.0 on x64 platforms allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via a crafted file.

CVE-2026-55011 [HIGH] CWE-191 CVE-2026-55011: Integer underflow (wrap or wraparound) in Microsoft Defender allows an unauthorized attacker to exec Integer underflow (wrap or wraparound) in Microsoft Defender allows an unauthorized attacker to execute code locally.

CVE-2026-55012 [HIGH] CWE-122 CVE-2026-55012: Integer overflow or wraparound in Microsoft Defender allows an unauthorized attacker to execute code Integer overflow or wraparound in Microsoft Defender allows an unauthorized attacker to execute code locally.

CVE-2021-34522 [HIGH] CVE-2021-34522: Microsoft Defender Remote Code Execution Vulnerability Microsoft Defender Remote Code Execution Vulnerability

CVE-2021-34471 [HIGH] CWE-269 CVE-2021-34471: Microsoft Windows Defender Elevation of Privilege Vulnerability Microsoft Windows Defender Elevation of Privilege Vulnerability

CVE-2023-24860 [HIGH] CWE-400 CVE-2023-24860: Microsoft Defender Denial of Service Vulnerability Microsoft Defender Denial of Service Vulnerability

CVE-2011-0037 [HIGH] CWE-20 CVE-2011-0037: Microsoft Malware Protection Engine before 1.1.6603.0, as used in Microsoft Malicious Software Remov Microsoft Malware Protection Engine before 1.1.6603.0, as used in Microsoft Malicious Software Removal Tool (MSRT), Windows Defender, Security Essentials, Forefront Client Security, Forefront Endpoint Protection 2010, and Windows Live OneCare, allows local users to gain privileges via a crafted value of an unspecified user registry key.

CVE-2023-33156 [HIGH] CWE-367 CVE-2023-33156: Microsoft Defender Elevation of Privilege Vulnerability Microsoft Defender Elevation of Privilege Vulnerability

CVE-2022-37971 [HIGH] CVE-2022-37971: Microsoft Windows Defender Elevation of Privilege Vulnerability Microsoft Windows Defender Elevation of Privilege Vulnerability

CVE-2023-23389 [MEDIUM] CWE-367 CVE-2023-23389: Microsoft Defender Elevation of Privilege Vulnerability Microsoft Defender Elevation of Privilege Vulnerability