CVE-2024-21413 (GCVE-0-2024-21413)

Vulnerability from cvelistv5 – Published: 2024-02-13 18:02 – Updated: 2025-10-21 23:05
VLAI CISA KEV
Title
Microsoft Outlook Remote Code Execution Vulnerability
Summary
Microsoft Outlook Remote Code Execution Vulnerability
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
SSVC
Exploitation: active Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-20 - Improper Input Validation
Assigner
References
Impacted products
Vendor Product Version
Microsoft Microsoft Office 2019 Affected: 19.0.0 , < https://aka.ms/OfficeSecurityReleases (custom)
Create a notification for this product.
Microsoft Microsoft 365 Apps for Enterprise Affected: 16.0.1 , < https://aka.ms/OfficeSecurityReleases (custom)
Create a notification for this product.
Microsoft Microsoft Office LTSC 2021 Affected: 16.0.1 , < https://aka.ms/OfficeSecurityReleases (custom)
Create a notification for this product.
Microsoft Microsoft Office 2016 Affected: 16.0.0 , < 16.0.5435.1001 (custom)
Create a notification for this product.
Date Public
2024-02-13 08:00
CISA KEV
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: a8826d4d-8b90-4261-8037-95b49377a690

Vulnerability ID: CVE-2024-21413

Status: Confirmed

Status Updated: 2025-02-06 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2025-02-06
Asserted: 2025-02-06
Scope
Notes: KEV entry: Microsoft Outlook Improper Input Validation Vulnerability | Affected: Microsoft / Office Outlook | Description: Microsoft Outlook contains an improper input validation vulnerability that allows for remote code execution. Successful exploitation of this vulnerability would allow an attacker to bypass the Office Protected View and open in editing mode rather than protected mode. | Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. | Due date: 2025-02-27 | Known ransomware campaign use (KEV): Unknown | Notes (KEV): https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21413 ; https://nvd.nist.gov/vuln/detail/CVE-2024-21413
Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details
Cwes CWE-20
Feed CISA Known Exploited Vulnerabilities Catalog
Product Office Outlook
Due Date 2025-02-27
Date Added 2025-02-06
Vendorproject Microsoft
Vulnerabilityname Microsoft Outlook Improper Input Validation Vulnerability
Knownransomwarecampaignuse Unknown
References
Created: 2026-02-02 13:24 UTC | Updated: 2026-02-06 07:53 UTC
Show details on NVD website
To clipboard 

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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.