Applied Cybernetics Group Sat, Nov 7, 2026 · data 12:17Z
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Microsoft SmartScreen Prompt Security Feature Bypass Vulnerability

Added to KEV
2024-04-30
Federal due date
2024-05-21
Vendor
Microsoft
Product
SmartScreen Prompt
EPSS
98.8th percentile (score 0.452, as of 2026-11-06)
NVD CVSS v3.1
—
Ransomware use
Unknown
Upstream
https://nvd.nist.gov/vuln/detail/CVE-2024-29988

CISA short description

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.

Required action

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

EPSS percentile is the FIRST.org exploit-probability ranking as of the date noted above; it moves daily. CVSS reflects NVD's analysis at time of publication.