Microsoft Outlook Improper Input Validation Vulnerability
Microsoft — Microsoft 365 Apps for Enterprise
Microsoft Outlook Remote Code Execution Vulnerability
9.8
94.7%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Published
- Feb 13, 2024
- Modified
- Aug 10, 2026
- Added to KEV
- Feb 6, 2025
- Federal patch due
- Feb 27, 2025
CISA required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Weakness classification
Affected packages
Proof-of-concept & exploitation references
8 foundWeaponization
Public repositories whose name or description references CVE-2024-21413, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit - cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
- xaitax/CVE-2024-21413-Microsoft-Outlook-Remote-Code-Execution-Vulnerability★ 770
Microsoft-Outlook-Remote-Code-Execution-Vulnerability
updated Sep 3, 2026
- CMNatic/CVE-2024-21413★ 280
CVE-2024-21413 PoC for THM Lab
updated Sep 3, 2026
- duy-31/CVE-2024-21413★ 158
Microsoft Outlook Information Disclosure Vulnerability (leak password hash) - Expect Script POC
updated Aug 24, 2026
- ThemeHackers/CVE-2024-21413★ 25
CVE-2024-21413 | Microsoft Outlook Remote Code Execution Vulnerability PoC
updated May 2, 2026
- r00tb1t/CVE-2024-21413-POC★ 17
Microsoft Outlook Information Disclosure Vulnerability (leak password hash) - CVE-2024-21413 POC
updated Mar 13, 2026
- mmathivanan17/CVE-2024-21413★ 11
Outlook exploitation
updated Dec 6, 2025
- Mdusmandasthaheer/CVE-2024-21413-Microsoft-Outlook-Remote-Code-Execution-Vulnerability★ 5
updated Sep 15, 2025
- ahmetkarakayaoffical/CVE-2024-21413-Microsoft-Outlook-Remote-Code-Execution-Vulnerability★ 4
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 güvenlik açığı, yerel NTLM bilgilerinin potansiyel sızıntısı ve uzaktan kod çalıştırma olasılığı dahil olmak üzere geniş kapsamlı etkilere sahiptir.
updated Oct 7, 2025
References
Frequently asked questions
What is CVE-2024-21413?
Microsoft Outlook Remote Code Execution Vulnerability
How severe is CVE-2024-21413?
CVE-2024-21413 has a CVSS base score of 9.8 out of 10 (CVSS 3.1).
Is CVE-2024-21413 actively exploited in the wild?
Yes. CVE-2024-21413 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Feb 6, 2025, meaning CISA has confirmed evidence of active exploitation.
What is the EPSS score for CVE-2024-21413?
94.7% - meaning FIRST.org's EPSS model estimates a 94.7% probability this vulnerability will be exploited in the wild within 30 days (100% percentile among all scored CVEs).
Is there exploit tooling available for CVE-2024-21413?
We found 8 public GitHub repositories referencing CVE-2024-21413, though none matched a known Nuclei template or Metasploit module at last check. Review each one before relying on it - see the proof-of-concept section above.
What type of vulnerability is CVE-2024-21413?
CVE-2024-21413 is classified under CWE-20 (CWE-20: Improper Input Validation).
Cross-checked against
Impactr finds and proves whether CVE-2024-21413 - or flaws like it - are actually reachable in your own web apps and APIs, with a reproducible exploit as evidence.
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