Microsoft Outlook Improper Input Validation Vulnerability
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.
What to do
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
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Details
- Vendor
- Microsoft
- Product
- Microsoft Outlook
- CVE
- CVE-2024-21413
- Affected versions
- Microsoft 365 Apps: no specific version given
Office 2016 2016: Office 2016 (no build specified)
Office 2019 2019: Office 2019 (no build specified)
Office LTSC 2021 2021: Office LTSC 2021 (no build specified) (from the advisory and NVD; check the exact builds in the official advisory) - CVSS score
- 9.8
- Actively exploited
- Yes, listed in the CISA Known Exploited Vulnerabilities catalog
- CISA due date
- February 27, 2025 (deadline for US federal agencies: a good benchmark for you too)
- Source
- CISA KEV – original advisory
- Published
- February 6, 2025
The description and the recommended action are quoted from the public advisory; severity, exploitation status and affected versions are compiled automatically from public sources and may contain errors. The vendor's original advisory prevails: check it before taking action. This information is provided without warranty and does not replace a professional assessment.