CVE-2021-1647

highpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.397 · 99 %ileexploit · PoCEURUUS

grimoire priorityP0 · Act now

Exploitable?

Yes · in the wild

CISA KEV · 1 exploit · PoC

Likely / severe?

39.7% (99th) EPSS

CVSS 7.2 · high

Is it mine?

14 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · nvd

added 2021-11-03remediate by 2021-11-17

required action Apply updates per vendor instructions.

EPSS · scored 2026-10-27

Microsoft Defender Remote Code Execution Vulnerability

cvss

Technical severity, 0–10. One row per scoring source.

8.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.07.2highAV:L/AC:L/Au:N/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 3.9 · impact 10

v2.07.2highAV:L/AC:L/Au:N/C:C/I:C/A:C/E:Hsecondary · CVSS-BT (t0sche)

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · NVD / NIST USexploitability 1.8 · impact 5.9

v3.18.8highAV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:Csecondary · ENISA EU

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · secure@microsoft.com USexploitability 1.8 · impact 5.9

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: active · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20US

exploits (1)

Public proof-of-concept and weaponised exploit code.

findcool/cve-2021-1647findcool/cve-2021-1647PoC · poc_in_github

affected products (14)

Products and version ranges known to be affected.

Microsoft Microsoft Security Essentials≤ N/Aenisa_euvdEU
Microsoft Microsoft System Center 2012 Endpoint Protection≤ N/Aenisa_euvdEU
Microsoft Microsoft System Center 2012 R2 Endpoint Protection≤ N/Aenisa_euvdEU
Microsoft Microsoft System Center Endpoint Protection≤ N/Aenisa_euvdEU
Microsoft Windows Defender≤ N/Aenisa_euvdEU
Microsoft Corp Microsoft Security Essentialsall versionsfstec_bduRU
Microsoft Corp System Center 2012 Endpoint Protectionall versionsfstec_bduRU
Microsoft Corp System Center 2012 R2 Endpoint Protectionall versionsfstec_bduRU
Microsoft Corp System Center Endpoint Protectionall versionsfstec_bduRU
Microsoft Corp Windows Defenderall versionsfstec_bduRU
microsoft security essentialsall versionsnvdUScpe:2.3:a:microsoft:security_essentials:*:*:*:*:*:*:*:*
microsoft system center endpoint protectionall versionsnvdUScpe:2.3:a:microsoft:system_center_endpoint_protection:*:*:*:*:*:*:*:*
microsoft system center endpoint protection= 2012nvdUScpe:2.3:a:microsoft:system_center_endpoint_protection:*:*:*:*:*:*:*:*
microsoft windows defenderall versionsnvdUScpe:2.3:a:microsoft:windows_defender:*:*:*:*:*:*:*:*

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2021-01-12modified 2026-06-17

references (8)

External citations — patches, advisories, analysis.

scry

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