CVE-2024-21413

What is affected

Vendor	Microsoft
Product	Office Outlook
Weakness	CWE-20

The vulnerability

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.

US federal civilian agencies were required to act by 27 February 2025 under BOD 22-01. The deadline is a compliance date, not a measure of severity — it says nothing about how dangerous the flaw is to anyone else.

Where this comes from

Every field on this page is taken from the CISA Known Exploited Vulnerabilities catalog, last synced 11 Nov 2026, 21:30. Nothing here is our own assessment. For the technical scoring, see the NVD record below.

NVD record ↗ CVE.org record ↗