---
title: "CVE-2023-36584: Microsoft Windows Mark of the Web (MOTW) Security Feature Bypass Vulnerability"
url: https://erroneo.us/security/cve/CVE-2023-36584/
description: "CVE-2023-36584 (Microsoft Windows): Exploited in the wild (CISA KEV). Windows Mark of the Web Security Feature Bypass Vulnerability"
type: vulnerability-record
section: "Security Digest"
date_published: 2023-10-10
date_modified: 2026-01-12
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2023-36584"
kev: true
cvss: 5.4
epss: 0.03251
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2023-36584: Microsoft Windows Mark of the Web (MOTW) Security Feature Bypass Vulnerability

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run Microsoft Windows. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2023-11-16, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2023-12-07 ; treat that as the outer limit, not the target.
- EPSS 3.3% , percentile 88: FIRST’s model estimates a 3.3% chance of exploitation activity in the next 30 days, higher than 88% of all scored CVEs (elevated). EPSS is a probability, not a verdict.
- Needs a user to click or open something. Phishing makes that realistic, but it is not wormable.

## What it is

Windows Mark of the Web Security Feature Bypass Vulnerability

## Affected products (CVE record)

- Microsoft Windows 10 Version 1809: 10.0.17763.0 < 10.0.17763.4974
- Microsoft Windows 10 Version 1809: 10.0.0 < 10.0.17763.4974
- Microsoft Windows Server 2019: 10.0.17763.0 < 10.0.17763.4974
- Microsoft Windows Server 2019 (Server Core installation): 10.0.17763.0 < 10.0.17763.4974
- Microsoft Windows Server 2022: 10.0.20348.0 < 10.0.20348.2031
- Microsoft Windows 11 version 21H2: 10.0.0 < 10.0.22000.2538
- Microsoft Windows 10 Version 21H2: 10.0.19043.0 < 10.0.19041.3570
- Microsoft Windows 11 version 22H2: 10.0.22621.0 < 10.0.22621.2428
- Microsoft Windows 10 Version 22H2: 10.0.19045.0 < 10.0.19045.3570
- Microsoft Windows 10 Version 1507: 10.0.10240.0 < 10.0.10240.20232

## Severity

- microsoft CVSS 3.1: 5.4 `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L/E:F/RL:O/RC:C`

## Exploitation

- CISA KEV: added 2023-11-16; federal due date 2023-12-07. Known ransomware use: Unknown.
- CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- CISA SSVC assessment: exploitation active , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 3.25% probability of exploitation activity in the next 30 days; percentile 88.

## Sources

- [Windows Mark of the Web Security Feature Bypass Vulnerability](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36584)
- [CVE.org record CVE-2023-36584](https://www.cve.org/CVERecord?id=CVE-2023-36584)
- [NVD entry CVE-2023-36584](https://nvd.nist.gov/vuln/detail/CVE-2023-36584)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-36584)

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Source page: https://erroneo.us/security/cve/CVE-2023-36584/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt