Microsoft Office
CVE-2024-21413 — Microsoft Outlook Remote Code Execution Vulnerability
Executive Summary
None
Overview
9.8
CVSS CRITICAL
Critical
MS Severity
Not Exploited
MS Exploit Status
Exploitation Unlikely
MS Exploit Likelihood
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
None
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 8.5
EPSS Score
0.9466
probability of exploitation in the next 30 days
0.9985 percentile - updated 2026-08-14
View on FIRST.org
Affected Products
6 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| Microsoft 365 Apps for Enterprise for 32-bit Systems | Click to Run (Security Update) |
Critical | Remote Code Execution | No |
| Microsoft 365 Apps for Enterprise for 64-bit Systems | Click to Run (Security Update) |
Critical | Remote Code Execution | No |
| Microsoft Office 2016 (32-bit edition) 5002537 (Security Update) 5002467 (Security Update) 5002522 (Security Update) 5002519 (Security Update) Critical Remote Code Execution Base: 9.8 Temporal: 8.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 16.0.5435.1001 16.0.5435.1000 Maybe None Microsoft Office 2016 (64-bit edition) 5002537 (Security Update) 5002467 (Security Update) 5002522 (Security Update) 5002519 (Security Update) Critical Remote Code Execution Base: 9.8 Temporal: 8.5 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C 16.0.5435.1001 16.0.5435.1000 Maybe None Microsoft Office 2019 for 32-bit editions | Click to Run (Security Update) |
Critical | Remote Code Execution | No |
| Microsoft Office 2019 for 64-bit editions | Click to Run (Security Update) |
Critical | Remote Code Execution | No |
| Microsoft Office LTSC 2021 for 32-bit editions | Click to Run (Security Update) |
Critical | Remote Code Execution | No |
| Microsoft Office LTSC 2021 for 64-bit editions | Click to Run (Security Update) |
Critical | Remote Code Execution | No |
Patches
1 patch
| Article | Type | Restart |
|---|---|---|
Click to Run |
Security Update | No |
Exploits & PoC
15 public PoCsUnverified third-party code
Public proof-of-concept repositories aggregated from PoC-in-GitHub. They are not reviewed and may be incomplete, non-functional, or malicious — inspect the code before running anything.
| Repository | Stars | Published | Description |
|---|---|---|---|
| xaitax/CVE-2024-21413-Microsoft-Outlook-Remote-Code-Execution-Vulnerability | 769 | 2024-02-16 | Microsoft-Outlook-Remote-Code-Execution-Vulnerability |
| CMNatic/CVE-2024-21413 | 277 | 2024-02-17 | CVE-2024-21413 PoC for THM Lab |
| duy-31/CVE-2024-21413 | 158 | 2024-02-15 | Microsoft Outlook Information Disclosure Vulnerability (leak password hash) - Expect Script POC |
| ThemeHackers/CVE-2024-21413 | 25 | 2024-08-31 | CVE-2024-21413 | Microsoft Outlook Remote Code Execution Vulnerability PoC |
| r00tb1t/CVE-2024-21413-POC | 17 | 2024-02-16 | Microsoft Outlook Information Disclosure Vulnerability (leak password hash) - CVE-2024-21413 POC |
| mmathivanan17/CVE-2024-21413 | 11 | 2025-11-30 | Outlook exploitation |
| Mdusmandasthaheer/CVE-2024-21413-Microsoft-Outlook-Remote-Code-Execution-Vulnerability | 5 | 2024-02-20 | |
| ahmetkarakayaoffical/CVE-2024-21413-Microsoft-Outlook-Remote-Code-Execution-Vulnerability | 4 | 2024-02-23 | Bu betik, Microsoft Outlook'ta keşfedilen ve CVSS değeri 9.8 olan önemli bir güvenlik açığı olan CVE-2024-21413 için bir kavram kanıtı (PoC) sunmaktadır. MonikerLink hatası olarak adlandırılan bu güve |
| D1se0/CVE-2024-21413-Vulnerabilidad-Outlook-LAB | 4 | 2024-12-04 | |
| dshabani96/CVE-2024-21413 | 2 | 2024-02-29 | |
| X-Projetion/CVE-2024-21413-Microsoft-Outlook-RCE-Exploit | 2 | 2024-05-03 | CVE-2024-21413 Microsoft Outlook RCE Exploit |
| gurleen-147/CVE-2024-21413-Microsoft-Outlook-Remote-Code-Execution-Vulnerability-PoC | 2 | 2025-11-06 | This repository contains research notes and a high-level proof-of-concept (PoC) for CVE-2024-21413, a vulnerability observed in certain mail clients when handling SMB/moniker-style links embedded in m |
| PolarisXSec/CVE-2024-21413 | 1 | 2025-05-11 | |
| MSeymenD/CVE-2024-21413 | 0 | 2024-02-19 | CVE-2024-21413 Açığını Kullanarak Giriş Bilgilerini Alma |
| KartheekKandalam99/SVPT_CW_2 | 0 | 2024-04-13 | CVE-2024-21413 Setup for CW |
Detection Rules
No public Sigma or Nuclei detection rule has been mapped to this CVE yet. Coverage is concentrated on exploited / high-profile vulnerabilities; check SigmaHQ for updates.
Acknowledgments
Haifei Li of Check Point Research (https://research.checkpoint.com/)
References
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