---
id: "CVE-2024-29988"
kind: "vulnerability"
aliases: ["CVE-2024-29988"]
title: "SmartScreen Prompt Security Feature Bypass Vulnerability"
severity: "high"
cvss: 8.8
epss: null
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "Microsoft SmartScreen Prompt", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "microsoft windows 10 1809", "fixed": ["10.0.17763.5696"], "affected": "< 10.0.17763.5696", "ecosystem": "vendor"}, {"name": "microsoft windows 10 21h2", "fixed": ["10.0.19044.4291"], "affected": "< 10.0.19044.4291", "ecosystem": "vendor"}, {"name": "microsoft windows 10 22h2", "fixed": ["10.0.19045.4291"], "affected": "< 10.0.19045.4291", "ecosystem": "vendor"}, {"name": "microsoft windows 11 21h2", "fixed": ["10.0.22000.2899"], "affected": "< 10.0.22000.2899", "ecosystem": "vendor"}, {"name": "microsoft windows 11 22h2", "fixed": ["10.0.22621.3447"], "affected": "< 10.0.22621.3447", "ecosystem": "vendor"}, {"name": "microsoft windows 11 23h2", "fixed": ["10.0.22631.3447"], "affected": "< 10.0.22631.3447", "ecosystem": "vendor"}, {"name": "microsoft windows server 2019", "fixed": ["10.0.17763.5696"], "affected": "< 10.0.17763.5696", "ecosystem": "vendor"}, {"name": "microsoft windows server 2022", "fixed": ["10.0.20348.2402"], "affected": "< 10.0.20348.2402", "ecosystem": "vendor"}, {"name": "microsoft windows server 2022 23h2", "fixed": ["10.0.25398.830"], "affected": "< 10.0.25398.830", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["exploited", "infrastructure", "windows"]
not_affected_if: []
published_at: "2024-04-09T17:16:01+00:00"
first_seen_at: "2026-10-23T19:11:51+00:00"
updated_at: "2026-10-23T22:29:05+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2024-29988", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-29988", "first_seen_at": "2026-10-23T22:29:05+00:00"}]
---

# SmartScreen Prompt Security Feature Bypass Vulnerability

Microsoft SmartScreen Prompt has a security feature bypass that lets an attacker get past the Mark of the Web warning on downloaded files. It is chained with CVE-2023-38831 and CVE-2024-21412 to run a malicious file.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Microsoft SmartScreen Prompt affected ? fixed ?
- vendor:microsoft windows 10 1809 affected < 10.0.17763.5696 fixed 10.0.17763.5696
- vendor:microsoft windows 10 21h2 affected < 10.0.19044.4291 fixed 10.0.19044.4291
- vendor:microsoft windows 10 22h2 affected < 10.0.19045.4291 fixed 10.0.19045.4291
- vendor:microsoft windows 11 21h2 affected < 10.0.22000.2899 fixed 10.0.22000.2899
- vendor:microsoft windows 11 22h2 affected < 10.0.22621.3447 fixed 10.0.22621.3447
- vendor:microsoft windows 11 23h2 affected < 10.0.22631.3447 fixed 10.0.22631.3447
- vendor:microsoft windows server 2019 affected < 10.0.17763.5696 fixed 10.0.17763.5696
- vendor:microsoft windows server 2022 affected < 10.0.20348.2402 fixed 10.0.20348.2402
- vendor:microsoft windows server 2022 23h2 affected < 10.0.25398.830 fixed 10.0.25398.830

## Fix

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

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2024-29988
- 2026-10-23T22:29:05+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2024-29988

## From the sources

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.

CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_