---
id: "CVE-2024-30040"
kind: "vulnerability"
aliases: ["CVE-2024-30040"]
title: "Windows MSHTML Platform Security Feature Bypass Vulnerability"
severity: "high"
cvss: 8.8
epss: null
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "Microsoft Windows", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "microsoft windows 10 1507", "fixed": ["10.0.10240.20651"], "affected": "< 10.0.10240.20651", "ecosystem": "vendor"}, {"name": "microsoft windows 10 1607", "fixed": ["10.0.14393.6981"], "affected": "< 10.0.14393.6981", "ecosystem": "vendor"}, {"name": "microsoft windows 10 1809", "fixed": ["10.0.17763.5820"], "affected": "< 10.0.17763.5820", "ecosystem": "vendor"}, {"name": "microsoft windows 10 21h2", "fixed": ["10.0.19044.4412"], "affected": "< 10.0.19044.4412", "ecosystem": "vendor"}, {"name": "microsoft windows 10 22h2", "fixed": ["10.0.19045.4412"], "affected": "< 10.0.19045.4412", "ecosystem": "vendor"}, {"name": "microsoft windows 11 21h2", "fixed": ["10.0.22000.2960"], "affected": "< 10.0.22000.2960", "ecosystem": "vendor"}, {"name": "microsoft windows 11 22h2", "fixed": ["10.0.22621.3593"], "affected": "< 10.0.22621.3593", "ecosystem": "vendor"}, {"name": "microsoft windows 11 23h2", "fixed": ["10.0.22631.3593"], "affected": "< 10.0.22631.3593", "ecosystem": "vendor"}, {"name": "microsoft windows server 2016", "fixed": ["10.0.14393.6981"], "affected": "< 10.0.14393.6981", "ecosystem": "vendor"}, {"name": "microsoft windows server 2019", "fixed": ["10.0.17763.5820"], "affected": "< 10.0.17763.5820", "ecosystem": "vendor"}, {"name": "microsoft windows server 2022", "fixed": ["10.0.20348.2458"], "affected": "< 10.0.20348.2458", "ecosystem": "vendor"}, {"name": "microsoft windows server 2022 23h2", "fixed": ["10.0.25398.887"], "affected": "< 10.0.25398.887", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["exploited", "infrastructure", "mshtml", "windows"]
not_affected_if: []
published_at: "2024-05-14T00:00:00+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-2024-30040", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-30040", "first_seen_at": "2026-10-23T22:29:05+00:00"}]
---

# Windows MSHTML Platform Security Feature Bypass Vulnerability

Microsoft Windows MSHTML Platform has a security feature bypass flaw that CISA lists as actively exploited. The sources do not say what the attacker bypasses or how the exploit is delivered.

_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 < 10.0.10240.20651 fixed 10.0.10240.20651
- vendor:microsoft windows 10 1607 affected < 10.0.14393.6981 fixed 10.0.14393.6981
- vendor:microsoft windows 10 1809 affected < 10.0.17763.5820 fixed 10.0.17763.5820
- vendor:microsoft windows 10 21h2 affected < 10.0.19044.4412 fixed 10.0.19044.4412
- vendor:microsoft windows 10 22h2 affected < 10.0.19045.4412 fixed 10.0.19045.4412
- vendor:microsoft windows 11 21h2 affected < 10.0.22000.2960 fixed 10.0.22000.2960
- vendor:microsoft windows 11 22h2 affected < 10.0.22621.3593 fixed 10.0.22621.3593
- vendor:microsoft windows 11 23h2 affected < 10.0.22631.3593 fixed 10.0.22631.3593
- vendor:microsoft windows server 2016 affected < 10.0.14393.6981 fixed 10.0.14393.6981
- vendor:microsoft windows server 2019 affected < 10.0.17763.5820 fixed 10.0.17763.5820
- vendor:microsoft windows server 2022 affected < 10.0.20348.2458 fixed 10.0.20348.2458
- vendor:microsoft windows server 2022 23h2 affected < 10.0.25398.887 fixed 10.0.25398.887

## Fix

Apply the Microsoft update for CVE-2024-30040 or the vendor mitigations; the sources do not name the patch or build.

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2024-30040
- 2026-10-23T22:29:05+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2024-30040

## From the sources

Microsoft Windows MSHTML Platform contains an unspecified vulnerability that allows for a security feature bypass.

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_