High 8.8Known exploited (CISA KEV)Published May 14, 2024

CVE-2024-30040Windows MSHTML Platform Security Feature Bypass Vulnerability

Updated under an hour ago (Oct 27, 2026, 11:50 AM ET)

Does this affect you?

It affects Microsoft Windows 10 Version 1809 and 12 other products. Add what you run to find out whether that includes you.

CISA lists it as known exploited since May 14, 2024; federal agencies had to remediate by Jun 4, 2024. Treat that date as your deadline.

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Every CVE for Microsoft Windows 10 Version 1809

Exploited in the last 30 days

Windows MSHTML Platform Security Feature Bypass Vulnerability

CVSS: 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
Weakness (CWE): CWE-20
Known exploited: Added to CISA KEV May 14, 2024; federal remediation due Jun 4, 2024Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
EPSS (exploitation in the next 30 days): 3.94% (percentile 90)
Assigned by: microsoft
NVD analysis: Analyzed
Record last updated: Oct 7, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Microsoft Windows 10 Version 1809 microsoft:windows_10_1809	from 10.0.17763.0 before 10.0.17763.5820	CNA record
Microsoft Windows Server 2019 microsoft:windows_server_2019 (from the name)	from 10.0.17763.0 before 10.0.17763.5820	CNA record
Microsoft Windows Server 2022 microsoft:windows_server_2022 (from the name)	from 10.0.20348.0 before 10.0.20348.2461	CNA record
Microsoft Windows 11 version 21H2 microsoft:windows_11_21h2	from 10.0.0 before 10.0.22000.2960	CNA record
Microsoft Windows 10 Version 21H2 microsoft:windows_10_21h2	from 10.0.19043.0 before 10.0.19044.4412	CNA record
Microsoft Windows 11 version 22H2 microsoft:windows_11_22h2	from 10.0.22621.0 before 10.0.22621.3593	CNA record
Microsoft Windows 10 Version 22H2 microsoft:windows_10_22h2	from 10.0.19045.0 before 10.0.19045.4412	CNA record
Microsoft Windows 11 version 22H3 microsoft:windows_11_22h3	from 10.0.22631.0 before 10.0.22631.3593	CNA record
Microsoft Windows 11 Version 23H2 microsoft:windows_11_23h2	from 10.0.22631.0 before 10.0.22631.3593	CNA record
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) microsoft:windows_server_2022_23h2	from 10.0.25398.0 before 10.0.25398.887	CNA record
1–10 of 25

References

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-30040	vendor-advisory, patch
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-30040	us-government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.