Improper input validation in Microsoft 365_apps
CVE-2024-21413
Microsoft Outlook Remote Code Execution Vulnerability
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.947 (99.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Microsoft 365_apps
- Microsoft 365 Apps For Enterprise — versions 16.0.1
- Microsoft Office 2016 — versions 16.0.0
- Microsoft Office 2019 — versions 19.0.0
- Microsoft Office Ltsc 2021 — versions 16.0.1
- Microsoft Office_2016
- Microsoft Office_2019
- Microsoft Office_long_term_servicing_channel — versions 2021
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Public proof-of-concept exploits
- xaitax/CVE-2024-21413-Microsoft-Outlook-Remote-Code-Execution-Vulnerability
- CMNatic/CVE-2024-21413
- duy-31/CVE-2024-21413
- ThemeHackers/CVE-2024-21413
- r00tb1t/CVE-2024-21413-POC
- mmathivanan17/CVE-2024-21413
- Mdusmandasthaheer/CVE-2024-21413-Microsoft-Outlook-Remote-Code-Execution-Vulnerability
- D1se0/CVE-2024-21413-Vulnerabilidad-Outlook-LAB
- ahmetkarakayaoffical/CVE-2024-21413-Microsoft-Outlook-Remote-Code-Execution-Vulnerability
- gurleen-147/CVE-2024-21413-Microsoft-Outlook-Remote-Code-Execution-Vulnerability-PoC
References
- secure@microsoft.com (vendor-advisory, Patch, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Technical Description)
- af854a3a-2127-422b-91ae-364da2661108 (Exploit)
- af854a3a-2127-422b-91ae-364da2661108 (Mitigation)
- 134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)
Frequently asked questions
- What is CVE-2024-21413?
- CVE-2024-21413 is a critical-severity vulnerability in Microsoft 365_apps, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2024-02-13.
- How severe is CVE-2024-21413?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2024-21413 known to be exploited?
- Yes. CVE-2024-21413 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-02-06), indicating it is being actively exploited. 132 public proof-of-concept repositories are indexed.