CVE-2024-21413 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2024-21413CRITICAL

Microsoft Outlook Remote Code Execution Vulnerability

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  H  H  H    9.8   .9466   99.9   YES

AFFECTED
  Product                            Versions  Fixed
  Microsoft 365 Apps for Enterprise  16.0.1 –  —
  Microsoft Office 2016              16.0.0 –  —
  Microsoft Office 2019              19.0.0 –  —
  Microsoft Office LTSC 2021         16.0.1 –  —

TIMELINE
  Dec 8   Reserved by microsoft
  Feb 6   Added to CISA KEV, remediation due 2025-02-27
  Feb 6   Published (CNA: microsoft)
  Aug 10  EXPLOIT PUBLISHED — CVE-2024-21413 (Microsoft 365 Apps for Enterprise). Public exploit reference added.

CWE-20 · CNA: microsoft · CVSS v3.1 · 5 references · NVD status: Analyzed · KEV due February 27, 2025

Description

Microsoft Outlook Remote Code Execution Vulnerability

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
December 8, 2023	Reserved	Reserved by microsoft
February 6, 2025	KEV ADDED	Added to CISA KEV, remediation due 2025-02-27
February 6, 2025	Published	Published (CNA: microsoft)
August 10, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2024-21413 (Microsoft 365 Apps for Enterprise). Public exploit reference added.

Affected

Affected products and packages — 4 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Microsoft	Microsoft 365 Apps for Enterprise	—	16.0.1	—
Microsoft	Microsoft Office 2016	—	16.0.0	—
Microsoft	Microsoft Office 2019	—	19.0.0	—
Microsoft	Microsoft Office LTSC 2021	—	16.0.1	—

Weaknesses

CWE-20

References (5)

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21413 [Patch, Vendor Advisory]
https://research.checkpoint.com/2024/the-risks-of-the-monikerlink-bug-in-microsoft-outlook-and-the-big-picture/ [Technical Description]
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-21413 [US Government Resource]
https://www.vicarius.io/vsociety/posts/cve-2024-21413-critical-monikerlink-vulnerability-affecting-microsoft-outlook-detection-script [Exploit]
https://www.vicarius.io/vsociety/posts/cve-2024-21413-critical-monikerlink-vulnerability-affecting-microsoft-outlook-mitigation-script [Mitigation]

Authoritative record: CVE-2024-21413 at cve.org

Vendors: microsoft

Weaknesses: CWE-20

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2024-21413 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.