Microsoft Windows Defender vulnerabilities
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Published CVEs affecting Microsoft Windows Defender: 3 record(s), with affected versions and fixes.cpe:2.3:a:microsoft:windows_defender
CVE-2026-70264
Medium · 5.5
CWE-59 Oct 13, 2026
Microsoft Defender Information Disclosure Vulnerability
Improper link resolution before file access ('link following') in Microsoft Defender allows an authorized attacker to disclose information locally.
CVE-2021-1647
High · 7.8
KEV High · 56 Public exploit Jan 12, 2021
Microsoft Defender Remote Code Execution Vulnerability
Microsoft Defender Remote Code Execution Vulnerability
CVE-2017-8540
High · 7.8
KEV High · 64 Public exploit CWE-787 May 26, 2017
Microsoft Malware Protection Engine Improper Restriction of Operations Vulnerability
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 memory corruption. aka "Microsoft Malware Protection Engine Remote Code Execution Vulnerability", a different vulnerability than CVE-2017-8538 and CVE-2017-8541.