Microsoft Malware Protection Engine
CVE-2021-1647 — Microsoft Defender Remote Code Execution Vulnerability
Executive Summary
None
Overview
7.8
CVSS HIGH
Critical
MS Severity
Exploited
MS Exploit Status
Exploitation Detected
MS Exploit Likelihood
CVSS Vector
ATTACK VECTOR
Local
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Unchanged
Temporal Score: 7.0
EPSS Score
0.39653
probability of exploitation in the next 30 days
0.98436 percentile - updated 2026-06-20
View on FIRST.org
Affected Products
43 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Microsoft Security Essentials | — |
Critical | Remote Code Execution | Unknown |
| Microsoft System Center 2012 Endpoint Protection | — |
Critical | Remote Code Execution | Unknown |
| Microsoft System Center 2012 R2 Endpoint Protection | — |
Critical | Remote Code Execution | Unknown |
| Microsoft System Center Endpoint Protection | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows 10 for 32-bit Systems | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows 10 for x64-based Systems | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows 10 Version 1607 for 32-bit Systems | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows 10 Version 1607 for x64-based Systems | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows 10 Version 1803 for 32-bit Systems | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows 10 Version 1803 for ARM64-based Systems | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows 10 Version 1803 for x64-based Systems | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows 10 Version 1809 for 32-bit Systems | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows 10 Version 1809 for ARM64-based Systems | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows 10 Version 1809 for x64-based Systems | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows 10 Version 1909 for 32-bit Systems | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows 10 Version 1909 for ARM64-based Systems | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows 10 Version 1909 for x64-based Systems | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows 10 Version 2004 for 32-bit Systems | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows 10 Version 2004 for ARM64-based Systems | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows 10 Version 2004 for x64-based Systems | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows 10 Version 20H2 for 32-bit Systems | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows 10 Version 20H2 for ARM64-based Systems | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows 10 Version 20H2 for x64-based Systems | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows 7 for 32-bit Systems Service Pack 1 | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows 7 for x64-based Systems Service Pack 1 | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows 8.1 for 32-bit systems | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows 8.1 for x64-based systems | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows RT 8.1 | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows Server 2008 for 32-bit Systems Service Pack 2 | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows Server 2008 R2 for x64-based Systems Service Pack 1 | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows Server 2012 | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows Server 2012 (Server Core installation) | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows Server 2012 R2 | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows Server 2012 R2 (Server Core installation) | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows Server 2016 | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows Server 2016 (Server Core installation) | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows Server 2019 | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows Server 2019 (Server Core installation) | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows Server, version 1909 (Server Core installation) | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows Server, version 2004 (Server Core installation) | — |
Critical | Remote Code Execution | Unknown |
| Windows Defender on Windows Server, version 20H2 (Server Core Installation) | — |
Critical | Remote Code Execution | Unknown |
Patches
1 patch
| Article | Type | Restart |
|---|---|---|
— |
Unknown |
Known Exploits
No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.
Acknowledgments
Microsoft has not published researcher acknowledgments for this CVE, or they are not yet reflected in our data source. Check the MSRC advisory directly for the most current credit information.
References
On This Page