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CVE-2024-20671

18
FAUCET Score

CVE-2024-20671 is a Microsoft Defender Security Feature Bypass Vulnerability affecting Microsoft Windows Defender Antimalware Platform. Rated Medium severity (CVSS 5.5), this local attack requires low privileges and complexity, potentially leading to high impact on availability, though confidentiality and integrity are not directly affected. There is currently no evidence of active exploitation, public exploit code, or inclusion in CISA's KEV catalog, despite some community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
< 4.18.24010.12CPE matchmatch criteria
cpe:2.3:a:microsoft:windows_defender_antimalware_platform:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.91%
Probability of exploitation in next 30 days
EPSS Percentile
56.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0091 is in the 96th percentile among its peer group of 15,938 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: Windows Defender Antimalware PlatformFixed in: 4.18.24010.12

Vendor Advisories (1)

microsoft2024-Mar/CVE-2024-20671Important

Microsoft Defender Security Feature Bypass Vulnerability

Mar 12, 2024

References

msrc.microsoft.com / update-guide/vulnerability/CVE-2024-20671
PatchVendor Advisory