CVE-2024-21413
criticalpriority · act · 90OT risk · criticalKEV · exploitedEPSS 0.947 · 100 %ileexploit · PoCDEEURUUSadded 2025-02-06remediate by 2025-02-27
required action Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
EPSS · scored 2026-10-27
Microsoft Outlook Improper Input Validation Vulnerability
Microsoft Outlook Remote Code Execution Vulnerability
remediations
Vendor fix, mitigation, or workaround guidance, as published by each source.
A vendor fix is available.
- FixedMicrosoft 365 Apps for Enterprise for 32-bit Systemsmsrc_csaf
https://aka.ms/OfficeSecurityReleases:Security Update:https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates
https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates - FixedMicrosoft 365 Apps for Enterprise for 64-bit Systemsmsrc_csaf
https://aka.ms/OfficeSecurityReleases:Security Update:https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates
https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates - FixedMicrosoft Office 2016 (32-bit edition)msrc_csaf
16.0.5435.1001:Security Update:https://support.microsoft.com/help/5002467
https://support.microsoft.com/help/5002467 - FixedMicrosoft Office 2016 (64-bit edition)msrc_csaf
16.0.5435.1001:Security Update:https://support.microsoft.com/help/5002467
https://support.microsoft.com/help/5002467 - FixedMicrosoft Office 2019 for 32-bit editionsmsrc_csaf
https://aka.ms/OfficeSecurityReleases:Security Update:https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates
https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates - FixedMicrosoft Office 2019 for 64-bit editionsmsrc_csaf
https://aka.ms/OfficeSecurityReleases:Security Update:https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates
https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates - FixedMicrosoft Office LTSC 2021 for 32-bit editionsmsrc_csaf
https://aka.ms/OfficeSecurityReleases:Security Update:https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates
https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates - FixedMicrosoft Office LTSC 2021 for 64-bit editionsmsrc_csaf
https://aka.ms/OfficeSecurityReleases:Security Update:https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates
https://docs.microsoft.com/en-us/officeupdates/microsoft365-apps-security-updates
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
ATT&CK techniques
ATT&CK techniques this enables or maps to.
exploits (42)
Public proof-of-concept and weaponised exploit code.
- CMNatic/CVE-2024-21413CVE-2024-21413 PoC for THM LabPoC · poc_in_github
affected products (42)
Products and version ranges known to be affected.
- Microsoft Skype for Business 2016 (32-bit)all versionscert_bundDEcpe:/a:microsoft:skype_for_business_2016:%2832-bit%29
- Microsoft Skype for Business 2016 (64-bit)all versionscert_bundDEcpe:/a:microsoft:skype_for_business_2016:%2864-bit%29
- Microsoft Skype for Business Server 2019 CU7all versionscert_bundDEcpe:/a:microsoft:skype:for_business_server_2019_cu7
- Microsoft Microsoft 365 Apps for Enterprise16.0.1 → https://aka.ms/OfficeSecurityReleasesenisa_euvdEU
advisories (2)
Vendor and ecosystem advisories describing this.
- WID-SEC-W-2024-0389Microsoft Office: Mehrere SchwachstellenDeutsch2024-02-13csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in verschiedenen Microsoft Office Anwendungen ausnutzen, um beliebigen Code auszuführen, seine Privilegien zu eskalieren oder vertrauliche Informationen offenzulegen.
- msrc_CVE-2024-21413Microsoft Outlook Remote Code Execution Vulnerability2024-02-13csaf · msrc_csafUS
To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle
also known as (4)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (10)
External citations — patches, advisories, analysis.
- https://cxsecurity.com/cveshow/CVE-2024-21413/cnnvd
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21413cnnvd
- https://research.checkpoint.com/2024/the-risks-of-the-monikerlink-bug-in-microsoft-outlook-and-the-big-picture/cnnvd
- https://vigilance.fr/vulnerability/Microsoft-365-Apps-Office-vulnerabilities-of-February-2024-43514cnnvd
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21413enisa_euvd
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21413PatchVendor Advisorynvd
- https://research.checkpoint.com/2024/the-risks-of-the-monikerlink-bug-in-microsoft-outlook-and-the-big-picture/Technical Descriptionnvd
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-21413US Government Resourcenvd
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