CVE-2024-21413

CRITICALNVD 9.89.8—Trending — 5 sources updated this weekExploited in the wild

9.8

Microsoft Outlook Remote Code Execution Vulnerability

CVSS v3: 9.8
EG Score: 9.8(high)
EPSS: 99.8%
KEV: ⚠ Exploited

Published

February 13, 2024

Last Modified

October 28, 2025

Advisory Details (5)

Auto-updated Jun 1, 2026

⚠️ Active exploitation confirmed. Patch available. Sources: microsoft, cisa.

cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-21413

generic

CVE-2024-21413 - Critical "MonikerLink" Vulnerability Affecting Microsoft Outlook - Mitigation Script - vsociety

https://www.vicarius.io/vsociety/posts/cve-2024-21413-critical-monikerlink-vulnerability-affecting-microsoft-outlook-mitigation-script

generic

CVE-2024-21413 - Critical "MonikerLink" Vulnerability Affecting Microsoft Outlook - Detection Script - vsociety

https://www.vicarius.io/vsociety/posts/cve-2024-21413-critical-monikerlink-vulnerability-affecting-microsoft-outlook-detection-script

generic🔴 Active Exploitation

The Risks of the #MonikerLink Bug in Microsoft Outlook and the Big Picture - Check Point Research

https://research.checkpoint.com/2024/the-risks-of-the-monikerlink-bug-in-microsoft-outlook-and-the-big-picture/

microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21413

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-20Improper Input Validation

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Microsoft MSRCCVE-2024-214132024-02-13
Microsoft Outlook Remote Code Execution Vulnerability

Data Freshness Timeline

(refreshed 127× in last 7d / 471× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 474 total refreshes for this CVE.

2026-06-24 06:18 UTCEG score recompute
2026-06-24 06:18 UTCVendor advisory
2026-06-24 06:17 UTCGHSA enrichment
2026-06-24 02:33 UTCEG score recompute
2026-06-24 02:33 UTCVendor advisory
2026-06-24 02:33 UTCGHSA enrichment
2026-06-23 22:48 UTCEG score recompute
2026-06-23 22:48 UTCVendor advisory
2026-06-23 22:48 UTCGHSA enrichment
2026-06-23 21:32 UTCEPSS rescore
2026-06-23 21:32 UTCEPSS rescore
2026-06-23 19:04 UTCEG score recompute
2026-06-23 19:04 UTCVendor advisory
2026-06-23 19:03 UTCGHSA enrichment
2026-06-23 17:44 UTCCISA KEV update
2026-06-23 15:19 UTCEG score recompute
2026-06-23 15:19 UTCVendor advisory
2026-06-23 15:19 UTCGHSA enrichment
2026-06-23 11:34 UTCEG score recompute
2026-06-23 11:34 UTCVendor advisory
2026-06-23 11:34 UTCGHSA enrichment
2026-06-23 07:50 UTCEG score recompute
2026-06-23 07:50 UTCVendor advisory
2026-06-23 07:49 UTCGHSA enrichment
2026-06-23 04:03 UTCEG score recompute

Show 75 more

2026-06-23 04:03 UTCVendor advisory
2026-06-23 04:03 UTCGHSA enrichment
2026-06-23 00:18 UTCEG score recompute
2026-06-23 00:18 UTCVendor advisory
2026-06-23 00:18 UTCGHSA enrichment
2026-06-22 20:31 UTCEG score recompute
2026-06-22 20:31 UTCVendor advisory
2026-06-22 20:31 UTCGHSA enrichment
2026-06-22 16:47 UTCEG score recompute
2026-06-22 16:47 UTCVendor advisory
2026-06-22 16:46 UTCGHSA enrichment
2026-06-22 13:01 UTCEG score recompute
2026-06-22 13:01 UTCVendor advisory
2026-06-22 13:00 UTCGHSA enrichment
2026-06-22 09:16 UTCEG score recompute
2026-06-22 09:16 UTCVendor advisory
2026-06-22 09:16 UTCGHSA enrichment
2026-06-22 05:30 UTCEG score recompute
2026-06-22 05:30 UTCVendor advisory
2026-06-22 05:30 UTCGHSA enrichment
2026-06-22 01:44 UTCEG score recompute
2026-06-22 01:44 UTCVendor advisory
2026-06-22 01:44 UTCGHSA enrichment
2026-06-21 21:58 UTCEG score recompute
2026-06-21 21:58 UTCVendor advisory
2026-06-21 21:57 UTCGHSA enrichment
2026-06-21 18:13 UTCEG score recompute
2026-06-21 18:13 UTCVendor advisory
2026-06-21 18:13 UTCGHSA enrichment
2026-06-21 14:28 UTCEG score recompute
2026-06-21 14:28 UTCVendor advisory
2026-06-21 14:28 UTCGHSA enrichment
2026-06-21 10:44 UTCEG score recompute
2026-06-21 10:44 UTCVendor advisory
2026-06-21 10:44 UTCGHSA enrichment
2026-06-21 07:00 UTCEG score recompute
2026-06-21 07:00 UTCVendor advisory
2026-06-21 06:59 UTCGHSA enrichment
2026-06-21 03:14 UTCEG score recompute
2026-06-21 03:14 UTCVendor advisory
2026-06-21 03:14 UTCGHSA enrichment
2026-06-20 23:30 UTCEG score recompute
2026-06-20 23:30 UTCVendor advisory
2026-06-20 23:29 UTCGHSA enrichment
2026-06-20 19:43 UTCEG score recompute
2026-06-20 19:43 UTCVendor advisory
2026-06-20 19:43 UTCGHSA enrichment
2026-06-20 15:59 UTCEG score recompute
2026-06-20 15:59 UTCVendor advisory
2026-06-20 15:59 UTCGHSA enrichment
2026-06-20 12:15 UTCEG score recompute
2026-06-20 12:15 UTCVendor advisory
2026-06-20 12:14 UTCGHSA enrichment
2026-06-20 08:27 UTCEG score recompute
2026-06-20 08:27 UTCVendor advisory
2026-06-20 08:27 UTCGHSA enrichment
2026-06-20 04:42 UTCEG score recompute
2026-06-20 04:42 UTCVendor advisory
2026-06-20 04:42 UTCGHSA enrichment
2026-06-20 00:57 UTCEG score recompute
2026-06-20 00:57 UTCVendor advisory
2026-06-20 00:56 UTCGHSA enrichment
2026-06-19 21:10 UTCEG score recompute
2026-06-19 21:10 UTCVendor advisory
2026-06-19 21:10 UTCGHSA enrichment
2026-06-19 17:24 UTCEG score recompute
2026-06-19 17:24 UTCVendor advisory
2026-06-19 17:23 UTCGHSA enrichment
2026-06-19 13:39 UTCEG score recompute
2026-06-19 13:39 UTCVendor advisory
2026-06-19 13:38 UTCGHSA enrichment
2026-06-19 09:52 UTCEG score recompute
2026-06-19 09:52 UTCVendor advisory
2026-06-19 09:52 UTCGHSA enrichment
2026-06-19 06:07 UTCEG score recompute

Publicly available exploits

(10 references)

Working exploit code is in the public domain (10 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

GitHub PoCmmathivanan17/CVE-2024-21413
First seen Nov 30, 2025
Outlook exploitation
Open source ↗
GitHub PoCD1se0/CVE-2024-21413-Vulnerabilidad-Outlook-LAB
First seen Dec 4, 2024
Open source ↗
GitHub PoCThemeHackers/CVE-2024-21413
First seen Aug 31, 2024
CVE-2024-21413 | Microsoft Outlook Remote Code Execution Vulnerability PoC
Open source ↗
GitHub PoCdshabani96/CVE-2024-21413
First seen Feb 29, 2024
Open source ↗
GitHub PoCahmetkarakayaoffical/CVE-2024-21413-Microsoft-Outlook-Remote-Code-Execution-Vulnerability
First seen Feb 23, 2024
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.
Open source ↗
GitHub PoCMdusmandasthaheer/CVE-2024-21413-Microsoft-Outlook-Remote-Code-Execution-Vulnerability
First seen Feb 20, 2024
Open source ↗
GitHub PoCCMNatic/CVE-2024-21413
First seen Feb 17, 2024
CVE-2024-21413 PoC for THM Lab
Open source ↗
GitHub PoCr00tb1t/CVE-2024-21413-POC
First seen Feb 16, 2024
Microsoft Outlook Information Disclosure Vulnerability (leak password hash) - CVE-2024-21413 POC
Open source ↗
GitHub PoCxaitax/CVE-2024-21413-Microsoft-Outlook-Remote-Code-Execution-Vulnerability
First seen Feb 16, 2024
Microsoft-Outlook-Remote-Code-Execution-Vulnerability
Open source ↗
GitHub PoCduy-31/CVE-2024-21413
First seen Feb 15, 2024
Microsoft Outlook Information Disclosure Vulnerability (leak password hash) - Expect Script POC
Open source ↗

Frequently asked(6)

What is CVE-2024-21413?

CVE-2024-21413 is a critical vulnerability published on February 13, 2024. Microsoft Outlook Remote Code Execution Vulnerability

When was CVE-2024-21413 disclosed?

CVE-2024-21413 was first published in the National Vulnerability Database on February 13, 2024, with the most recent update on October 28, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2024-21413 actively exploited?

Yes. CISA added CVE-2024-21413 to the Known Exploited Vulnerabilities catalog on February 6, 2025, affecting Microsoft Office Outlook. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.

What is the CVSS score of CVE-2024-21413?

CVE-2024-21413 has a CVSS v3 base score of 9.8 (NVD).

Which products are affected by CVE-2024-21413?

CVE-2024-21413 affects Microsoft Office Outlook. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.

How do I remediate CVE-2024-21413?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-21413, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2024-21413

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CVE-2024-21413

Published

Last Modified

Advisory Details (5)

Known Exploited Vulnerabilities Catalog | CISA

CVE-2024-21413 - Critical "MonikerLink" Vulnerability Affecting Microsoft Outlook - Mitigation Script - vsociety

CVE-2024-21413 - Critical "MonikerLink" Vulnerability Affecting Microsoft Outlook - Detection Script - vsociety

The Risks of the #MonikerLink Bug in Microsoft Outlook and the Big Picture - Check Point Research

Security Update Guide - Microsoft Security Response Center

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Publicly available exploits

Frequently asked(6)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2024-21413?

Same vendor

Same CWE

CVE-2024-21413

📅 Published

🔄 Last Modified

📋 Advisory Details (5)

Known Exploited Vulnerabilities Catalog | CISA

CVE-2024-21413 - Critical "MonikerLink" Vulnerability Affecting Microsoft Outlook - Mitigation Script - vsociety

CVE-2024-21413 - Critical "MonikerLink" Vulnerability Affecting Microsoft Outlook - Detection Script - vsociety

The Risks of the #MonikerLink Bug in Microsoft Outlook and the Big Picture - Check Point Research

Security Update Guide - Microsoft Security Response Center

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(6)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2024-21413?

🔗 Related CVEs(same vendor + same CWE)

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Same CWE

Published

Last Modified

Advisory Details (5)

Frequently asked(6)

Related CVEs(same vendor + same CWE)