---
id: "CVE-2023-36584"
kind: "vulnerability"
aliases: ["CVE-2023-36584"]
title: "Windows Mark of the Web Security Feature Bypass Vulnerability"
severity: "medium"
cvss: 5.4
epss: null
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "Microsoft Windows", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "microsoft windows 10 1507", "fixed": ["10.0.10240.20232"], "affected": "< 10.0.10240.20232", "ecosystem": "vendor"}, {"name": "microsoft windows 10 1809", "fixed": ["10.0.17763.4974"], "affected": "< 10.0.17763.4974", "ecosystem": "vendor"}, {"name": "microsoft windows 10 21h1", "fixed": ["10.0.19041.3570"], "affected": "< 10.0.19041.3570", "ecosystem": "vendor"}, {"name": "microsoft windows 10 22h2", "fixed": ["10.0.19041.3570"], "affected": "< 10.0.19041.3570", "ecosystem": "vendor"}, {"name": "microsoft windows 11 21h2", "fixed": ["10.0.22000.2538"], "affected": "< 10.0.22000.2538", "ecosystem": "vendor"}, {"name": "microsoft windows 11 22h2", "fixed": ["10.0.22621.2428"], "affected": "< 10.0.22621.2428", "ecosystem": "vendor"}, {"name": "microsoft windows server 2008", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "microsoft windows server 2008", "fixed": [], "affected": "= r2", "ecosystem": "vendor"}, {"name": "microsoft windows server 2012", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "microsoft windows server 2012", "fixed": [], "affected": "= r2", "ecosystem": "vendor"}, {"name": "microsoft windows server 2016", "fixed": ["10.0.14393.6351"], "affected": "< 10.0.14393.6351", "ecosystem": "vendor"}, {"name": "microsoft windows server 2019", "fixed": ["10.0.17763.4974"], "affected": "< 10.0.17763.4974", "ecosystem": "vendor"}, {"name": "microsoft windows server 2022", "fixed": ["10.0.20348.2031"], "affected": "< 10.0.20348.2031", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["exploited", "infrastructure", "windows"]
not_affected_if: ["unknown"]
published_at: "2023-10-10T18:15:14+00:00"
first_seen_at: "2026-10-23T19:11:51+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-2023-36584", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-36584", "first_seen_at": "2026-10-23T22:29:04+00:00"}]
---

# Windows Mark of the Web Security Feature Bypass Vulnerability

A flaw in the Windows Mark of the Web feature lets a crafted file bypass the warning that normally marks files downloaded from the internet as untrusted. An attacker who gets a user to open such a file can avoid the Windows security prompts that would otherwise appear.

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

## Affected

- vendor:Microsoft Windows affected ? fixed ?
- vendor:microsoft windows 10 1507 affected < 10.0.10240.20232 fixed 10.0.10240.20232
- vendor:microsoft windows 10 1809 affected < 10.0.17763.4974 fixed 10.0.17763.4974
- vendor:microsoft windows 10 21h1 affected < 10.0.19041.3570 fixed 10.0.19041.3570
- vendor:microsoft windows 10 22h2 affected < 10.0.19041.3570 fixed 10.0.19041.3570
- vendor:microsoft windows 11 21h2 affected < 10.0.22000.2538 fixed 10.0.22000.2538
- vendor:microsoft windows 11 22h2 affected < 10.0.22621.2428 fixed 10.0.22621.2428
- vendor:microsoft windows server 2008 affected ? fixed ?
- vendor:microsoft windows server 2008 affected = r2 fixed ?
- vendor:microsoft windows server 2012 affected ? fixed ?
- vendor:microsoft windows server 2012 affected = r2 fixed ?
- vendor:microsoft windows server 2016 affected < 10.0.14393.6351 fixed 10.0.14393.6351
- vendor:microsoft windows server 2019 affected < 10.0.17763.4974 fixed 10.0.17763.4974
- vendor:microsoft windows server 2022 affected < 10.0.20348.2031 fixed 10.0.20348.2031

## Fix

Apply the Microsoft update for CVE-2023-36584 per vendor instructions; CISA says to discontinue use of the product if mitigations are unavailable.
The sources do not name the patched build numbers.

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-36584
- 2026-10-23T22:29:04+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2023-36584

## From the sources

Microsoft Windows Mark of the Web (MOTW) contains a security feature bypass vulnerability resulting in a limited loss of integrity and availability of security features.

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_