CISA-confirmed known exploited vulnerability

CVE-2024-29988

Microsoft SmartScreen Prompt Security Feature Bypass Vulnerability

Microsoft · SmartScreen Prompt

Vulnerability details

Microsoft SmartScreen Prompt contains a security feature bypass vulnerability that allows an attacker to bypass the Mark of the Web (MotW) feature. This vulnerability can be chained with CVE-2023-38831 and CVE-2024-21412 to execute a malicious file.

Added to CISA KEV: 2024-04-30

Ransomware campaign use: Unknown

CISA due date: 2024-05-21

Defensive guidance from CISA

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

This is the source's required-action field, not an independently validated patch procedure. Refer to the vendor for exact affected versions and fixes.

Source catalog date: 2026-11-06T19:44:45.1797Z · Last retrieved: 2026-11-06 21:02:26 UTC

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