---
id: "CVE-2023-24880"
kind: "vulnerability"
aliases: ["CVE-2023-24880"]
title: "Windows SmartScreen Security Feature Bypass Vulnerability"
severity: "high"
cvss: 4.4
epss: null
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "Microsoft Windows", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "microsoft windows 10 1607", "fixed": ["10.0.14393.5786"], "affected": "< 10.0.14393.5786", "ecosystem": "vendor"}, {"name": "microsoft windows 10 1809", "fixed": ["10.0.17763.4131"], "affected": "< 10.0.17763.4131", "ecosystem": "vendor"}, {"name": "microsoft windows 10 20h2", "fixed": ["10.0.19042.2728"], "affected": "< 10.0.19042.2728", "ecosystem": "vendor"}, {"name": "microsoft windows 10 21h2", "fixed": ["10.0.19044.2728"], "affected": "< 10.0.19044.2728", "ecosystem": "vendor"}, {"name": "microsoft windows 10 22h2", "fixed": ["10.0.19045.2728"], "affected": "< 10.0.19045.2728", "ecosystem": "vendor"}, {"name": "microsoft windows 11 21h2", "fixed": ["10.0.22000.1696"], "affected": "< 10.0.22000.1696", "ecosystem": "vendor"}, {"name": "microsoft windows 11 22h2", "fixed": ["10.0.22000.1413"], "affected": "< 10.0.22000.1413", "ecosystem": "vendor"}, {"name": "microsoft windows server 2016", "fixed": ["10.0.14393.5786"], "affected": "< 10.0.14393.5786", "ecosystem": "vendor"}, {"name": "microsoft windows server 2019", "fixed": ["10.0.17763.4131"], "affected": "< 10.0.17763.4131", "ecosystem": "vendor"}, {"name": "microsoft windows server 2022", "fixed": ["10.0.20348.1602"], "affected": "< 10.0.20348.1602", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["exploited", "infrastructure", "ransomware", "windows"]
not_affected_if: ["unknown"]
published_at: "2023-03-14T00:00:00+00:00"
first_seen_at: "2026-10-23T19:11:52+00:00"
updated_at: "2026-10-23T22:29:04+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-24880", "first_seen_at": "2026-10-23T19:11:52+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-24880", "first_seen_at": "2026-10-23T22:29:04+00:00"}]
---

# Windows SmartScreen Security Feature Bypass Vulnerability

Microsoft Windows SmartScreen has a security feature bypass that lets a specially crafted malicious file evade Mark of the Web warnings. CISA lists it as actively exploited, with ransomware use tagged in the catalog.

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

## Affected

- vendor:Microsoft Windows affected ? fixed ?
- vendor:microsoft windows 10 1607 affected < 10.0.14393.5786 fixed 10.0.14393.5786
- vendor:microsoft windows 10 1809 affected < 10.0.17763.4131 fixed 10.0.17763.4131
- vendor:microsoft windows 10 20h2 affected < 10.0.19042.2728 fixed 10.0.19042.2728
- vendor:microsoft windows 10 21h2 affected < 10.0.19044.2728 fixed 10.0.19044.2728
- vendor:microsoft windows 10 22h2 affected < 10.0.19045.2728 fixed 10.0.19045.2728
- vendor:microsoft windows 11 21h2 affected < 10.0.22000.1696 fixed 10.0.22000.1696
- vendor:microsoft windows 11 22h2 affected < 10.0.22000.1413 fixed 10.0.22000.1413
- vendor:microsoft windows server 2016 affected < 10.0.14393.5786 fixed 10.0.14393.5786
- vendor:microsoft windows server 2019 affected < 10.0.17763.4131 fixed 10.0.17763.4131
- vendor:microsoft windows server 2022 affected < 10.0.20348.1602 fixed 10.0.20348.1602

## Fix

Apply the Microsoft Windows updates per vendor instructions; the specific patched build is not in the sources.

## Timeline

- 2026-10-23T19:11:52+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-24880
- 2026-10-23T22:29:04+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2023-24880

## From the sources

Microsoft Windows SmartScreen contains a security feature bypass vulnerability that could allow an attacker to evade Mark of the Web (MOTW) defenses via a specially crafted malicious file.

CISA required action: Apply updates per vendor instructions.

---

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