Is CVE-2021-1647 actively exploited?

CVE-2021-1647 has no public evidence of in-the-wild exploitation as of 2025-10-30.

What is the CVSS score for CVE-2021-1647?

CVE-2021-1647 has a CVSS score of 7.8 (HIGH severity). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

How do I patch CVE-2021-1647?

Patch guidance is available from microsoft security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2021-1647.

Fix CVE-2021-1647 - HIGH microsoft windows defender

Q: Which products are affected by CVE-2021-1647?

5 products: microsoft windows defender, microsoft security essentials, microsoft system center endpoint protection, microsoft system center endpoint protection, microsoft system center endpoint protection.

Description

Microsoft Defender Remote Code Execution Vulnerability

CVSS Metrics

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 Action: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: NVD-CWE-noinfo

Metadata

Primary Vendor: MICROSOFT
Published: 1/12/2021
Last Modified: 10/30/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

microsoft : windows_defendermicrosoft : security_essentialsmicrosoft : system_center_endpoint_protectionmicrosoft : system_center_endpoint_protectionmicrosoft : system_center_endpoint_protection

Remediation Guidance

Executive Summary

View on NIST NVD