CVE-2024-21378
highpriority · track · 14EPSS 0.110 · 96 %ileexploit · PoCDEEURUUSEPSS · scored 2026-10-26
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 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 - FixedMicrosoft Outlook 2016 (32-bit edition)msrc_csaf
16.0.5435.1000:Security Update:https://support.microsoft.com/help/5002543
https://support.microsoft.com/help/5002543 - FixedMicrosoft Outlook 2016 (64-bit edition)msrc_csaf
16.0.5435.1000:Security Update:https://support.microsoft.com/help/5002543
https://support.microsoft.com/help/5002543
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.
exploits (1)
Public proof-of-concept and weaponised exploit code.
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-2024-21378Microsoft 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 (5)
External citations — patches, advisories, analysis.
- https://cxsecurity.com/cveshow/CVE-2024-21378/cnnvd
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21378cnnvd
- https://vigilance.fr/vulnerability/Microsoft-365-Apps-Office-vulnerabilities-of-February-2024-43514cnnvd
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21378enisa_euvd
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21378PatchVendor Advisorynvd
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