CVE-2021-1647

ENISA EUVD: EUVD-2021-7114 ↗
Exploited in the Wild ✓ Confirmed 0-Day ★ Google Project Zero
Triaged: March 3, 2026 3 articles Published: 2021-01-12
VulnLookup ↗ NVD ↗ EUVD ↗ MITRE ↗ Advisory ↗ P0 Sheet ↗ CISA KEV ↗

EPSS Score

Source: FIRST.org · 2026-05-23
77.39%
probability
This CVE has a 77.39% probability of being exploited in the next 30 days.
0% Top 99.0th percentile of all CVEs 100%

CVSS v3.1

Source: VulnerabilityLookup (CIRCL)
7.8
HIGH
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Temporal
Exploit Code Maturity
Proof-of-Concept
Remediation Level
Official Fix
Report Confidence
Confirmed
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C

CVSS v2 (legacy)

7.2
HIGH
Access Vector
Local
Access Complexity
Low
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete
AV:L/AC:L/Au:N/C:C/I:C/A:C

Description

NVD
Microsoft Defender Remote Code Execution Vulnerability

Affected Products

Microsoft
Microsoft System Center Endpoint Protection
N/A
Microsoft
Microsoft System Center 2012 R2 Endpoint Protection
N/A
Microsoft
Microsoft Security Essentials
N/A
Microsoft
Microsoft System Center 2012 Endpoint Protection
N/A
Microsoft
Windows Defender
N/A

Google Project Zero

Patched
Jan. 12, 2021
Reported by
???
Root Cause Analysis
https://googleprojectzero.github.io/0days-in-the-wild/0day-RCAs/2021/CVE-2021-1647.html

Exploits & PoC

findcool/cve-2021-1647
1 2021-01-20
1 repo — triés par ⭐ Rechercher sur GitHub ↗

Signal Intelligence

Confidenceⓘ
82%
EPSS 77.39%
CVSS v3.1 7.8
Mentions 3
Last Seen Nov 09, 2021

CNA Information

CNA Assigner
microsoft
CNA Title
Microsoft Defender Remote Code Execution Vulnerability

Analyst Note

This CVE is confirmed as a legitimate remote code execution vulnerability in Microsoft Defender with a high CVSS score (7.8). While it lacks CISA KEV listing, the inclusion in Google Project Zero and an official CERT-EU security advisory (with high signal score) provide strong corroboration of its authenticity and severity.

Triage Info

Decided atMar 03, 2026
Published DateJan 12, 2021