CVE-2024-21413
Microsoft Outlook Remote Code Execution Vulnerability
Microsoft Outlook Remote Code Execution Vulnerability
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Microsoft Outlook Remote Code Execution Vulnerability
Microsoft Outlook Remote Code Execution Vulnerability
- Record
CVE-2024-21413- CVSS 3.1
- 9.8 Critical
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 - Weakness
- CWE-20
- Updated
- 2026-11-02
EUVDEUVD-2024-19122
Microsoft Outlook Remote Code Execution Vulnerability
- Record
EUVD-2024-19122- CVSS 3.1
- 9.8 Critical
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 - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-9mp4-h7q5-2rgq
Microsoft Outlook Remote Code Execution Vulnerability
Microsoft Outlook Remote Code Execution Vulnerability
- Record
GHSA-9mp4-h7q5-2rgq- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-20
- Updated
- 2026-11-02
CISA KEV No score
Microsoft Outlook Improper Input Validation Vulnerability
Microsoft Outlook contains an improper input validation vulnerability that allows for remote code execution. Successful exploitation of this vulnerability would allow an attacker to bypass the Office Protected View and open in editing mode rather than protected mode.
- Record
CVE-2024-21413- Weakness
- CWE-20
- Updated
- 2026-11-02
NVD
Microsoft Outlook Remote Code Execution Vulnerability
- Record
CVE-2024-21413- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-20
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | duy-31/CVE-2024-21413 | 2024-02-15 |
| PoC in GitHub | r00tb1t/CVE-2024-21413-POC | 2024-02-16 |
| PoC in GitHub | xaitax/CVE-2024-21413-Microsoft-Outlook-Remote-Code-Execution-Vulnerability | 2024-02-16 |
| PoC in GitHub | CMNatic/CVE-2024-21413 | 2024-02-17 |
| PoC in GitHub | MSeymenD/CVE-2024-21413 | 2024-02-19 |
| PoC in GitHub | Mdusmandasthaheer/CVE-2024-21413-Microsoft-Outlook-Remote-Code-Execution-Vulnerability | 2024-02-20 |
| PoC in GitHub | ahmetkarakayaoffical/CVE-2024-21413-Microsoft-Outlook-Remote-Code-Execution-Vulnerability | 2024-02-23 |
| PoC in GitHub | dshabani96/CVE-2024-21413 | 2024-02-29 |
| PoC in GitHub | KartheekKandalam99/SVPT_CW_2 | 2024-04-13 |
| PoC in GitHub | X-Projetion/CVE-2024-21413-Microsoft-Outlook-RCE-Exploit | 2024-05-03 |
Show 15 moreShow less
Plus 17 more. The full list has every link.
History
| Recorded | Changed | Sources |
|---|---|---|
| exploitation | ||
| exploits, exploits_more | ||
| first indexed | CVE List, EUVD, GitHub Advisories, CISA KEV, NVD, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2024-21413 is a critical vulnerability (CVSS 9.8) in Microsoft 365 Apps, published February 13, 2024. CISA lists it as known to be exploited, since February 6, 2025. EUVD reports exploitation since February 6, 2025. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 94.7%, the 99th percentile. No source names a fixed version.
References
msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21413
cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-21413
vicarius.io/vsociety/posts/cve-2024-21413-critical-monikerlink-vulnerability-affecting-microsoft-outlook-mitigation-script
research.checkpoint.com/2024/the-risks-of-the-monikerlink-bug-in-microsoft-outlook-and-the-big-picture
nvd.nist.gov/vuln/detail/CVE-2024-21413
github.com/advisories/GHSA-9mp4-h7q5-2rgq