CVE-2021-1666

—

CVSS 3.1

8.8 high

EPSS

3%p86

Published

Jan 12, 2021 (Jan 12, 2021)

Modified

Jun 17, 2026

Description

Remote Procedure Call Runtime Remote Code Execution Vulnerability

Vendors: microsoft
Products: windows 10, windows 7, windows 8.1, windows rt 8.1, windows server 2008, windows server 2012, windows server 2016, windows server 2019
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (3.0%)

In the news3 stories

January 2021 Patch Tuesday: Microsoft plugs Defender zero-day RCE

Help Net SecurityNov 14, 08:33 UTC · Nov 14, 2023Exploit / PoC in the wildCVE-2021-1647 CVE-2021-1648 CVE-2021-1658+8 CVEs

60

Microsoft Patch Tuesday for January 2021 fixes 83 flaws, including an actively exploited issue

Security AffairsJan 13, 14:25 UTC · Jan 13, 2021Vulnerability in the wildCVE-2021-1647 CVE-2021-1648 CVE-2021-1665+10 CVEs

60

Microsoft Fixes Windows Defender Zero

Infosecurity MagazineJan 13, 11:20 UTC · Jan 13, 2021Exploit / PoC in the wildCVE-2021-1647 CVE-2021-1648 CVE-2021-1666+2 CVEs

60