What is CVE-2024-21315?

CVE-2024-21315 is a high-severity vulnerability in Microsoft Defender For Endpoint, classified under Improper Input Validation. CVSS score: 7.8/10. Published 2024-02-13.

How severe is CVE-2024-21315?

High severity. CVSS v3 base score is 7.8 out of 10.

Improper input validation in Microsoft Defender For Endpoint

CVE-2024-21315

Microsoft Defender for Endpoint Protection Elevation of Privilege Vulnerability

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2024-02-13 · last modified 2026-08-10.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.006 (48.5th percentile), scored 2026-09-27.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 48.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21315 (vendor-advisory, Patch, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2024-21315?: CVE-2024-21315 is a high-severity vulnerability in Microsoft Defender For Endpoint, classified under Improper Input Validation. CVSS score: 7.8/10. Published 2024-02-13.
How severe is CVE-2024-21315?: High severity. CVSS v3 base score is 7.8 out of 10.