High severity · published Jan 12, 2021
CVE-2021-1647
Microsoft Defender Remote Code Execution Vulnerability
In wildKEV
7.8
CVSS
39.7%
EPSS
Yes
On KEV
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)39.7% · higher than 99% of CVEs
Exploited in the wildYes
CISA KEVListed Nov 3, 2021
Federal remediation dueNov 17, 2021
Ransomware campaign useNot known
Affected products
Which versions
MS
Microsoft Security Essentials · Microsoft
All versions, or not specified · source: vendor
MS
Microsoft System Center 2012 Endpoint Protection · Microsoft
All versions, or not specified · source: vendor
MS
Microsoft System Center 2012 R2 Endpoint Protection · Microsoft
All versions, or not specified · source: vendor
MS
Microsoft System Center Endpoint Protection · Microsoft
All versions, or not specified · source: vendor
WD
Windows Defender · Microsoft
All versions, or not specified · source: vendor, NVD
SE
Security Essentials · Microsoft
All versions, or not specified · source: NVD
SC
System Center Endpoint Protection · Microsoft
2012; 2012 · source: NVD
DE
Defender · Microsoft
All versions, or not specified · source: KEV
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-1647
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-1647
CISA KEV catalogue
https://www.cisa.gov/known-exploited-vulnerabilities-catalog
vendor-advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-1647
More from Microsoft Security Essentials
7.8
CVE-2017-8540
Microsoft Malware Protection Engine Improper Restriction of Operations Vulnerability
8.8
CVE-2018-0986
A remote code execution vulnerability exists when the Microsoft Malware Protection Engine does not properly scan a specially crafted file, leading to memory corruption, aka…
7.8
CVE-2021-24092
Microsoft Defender Elevation of Privilege Vulnerability
7.8
CVE-2020-1170
An elevation of privilege vulnerability exists in Windows Defender that leads arbitrary file deletion on the system.To exploit the vulnerability, an attacker would first have to…
7.8
CVE-2020-1163
An elevation of privilege vulnerability exists in Windows Defender that leads arbitrary file deletion on the system.To exploit the vulnerability, an attacker would first have to…