Vulnerability in Microsoft Security Essentials
CVE-2021-1647
Microsoft Defender Remote Code Execution Vulnerability
EPSS: 0.397 (98.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Microsoft Security Essentials — versions N/A
- Microsoft System Center 2012 Endpoint Protection — versions N/A
- Microsoft System Center 2012 R2 Endpoint Protection — versions N/A
- Microsoft System Center Endpoint Protection — versions N/A
- Microsoft Security_essentials
- Microsoft System_center_endpoint_protection — versions 2012
- Microsoft Windows_10_1507
- Microsoft Windows_10_1607
- Microsoft Windows_10_1803
- Microsoft Windows_10_1809
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply updates per vendor instructions.
Public proof-of-concept exploits
References
- secure@microsoft.com (vendor-advisory, Patch, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Patch, Vendor Advisory)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2021-1647?
- CVE-2021-1647 is a high-severity vulnerability in Microsoft Security Essentials. CVSS score: 7.8/10. Published 2021-01-12.
- How severe is CVE-2021-1647?
- High severity. CVSS v3 base score is 7.8 out of 10.
- Is CVE-2021-1647 known to be exploited?
- Yes. CVE-2021-1647 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03), indicating it is being actively exploited. 20 public proof-of-concept repositories are indexed.