Medium 5.4Known exploited (CISA KEV)Published Oct 10, 2023

CVE-2023-36584Windows Mark of the Web Security Feature Bypass Vulnerability

Updated under an hour ago (Oct 27, 2026, 7:20 PM ET)

Does this affect you?

It affects Microsoft Windows 10 Version 1809 and 17 other products. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Nov 16, 2023; federal agencies had to remediate by Dec 7, 2023. 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 Mark of the Web Security Feature Bypass Vulnerability

CVSS: 5.4 MEDIUM (v3.1, CNA)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
Weakness (CWE): Not given
Known exploited: Added to CISA KEV Nov 16, 2023; federal remediation due Dec 7, 2023Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
EPSS (exploitation in the next 30 days): 3.25% (percentile 88)
Assigned by: microsoft
NVD analysis: Analyzed
Record last updated: Jan 12, 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 10.0.17763.4974	CNA record
Microsoft Windows Server 2019 microsoft:windows_server_2019 (from the name)	from 10.0.17763.0 before 10.0.17763.4974	CNA record
Microsoft Windows Server 2022 microsoft:windows_server_2022 (from the name)	from 10.0.20348.0 before 10.0.20348.2031	CNA record
Microsoft Windows 11 version 21H2 microsoft:windows_11_21h2	from 10.0.0 before 10.0.22000.2538	CNA record
Microsoft Windows 10 Version 21H2 microsoft:windows_10_21h2	10.0.19043.0 builds before 10.0.19041.3570	CNA record
Microsoft Windows 11 version 22H2 microsoft:windows_11_22h2	from 10.0.22621.0 before 10.0.22621.2428	CNA record
Microsoft Windows 10 Version 22H2 microsoft:windows_10_22h2	from 10.0.19045.0 before 10.0.19045.3570	CNA record
Microsoft Windows 10 Version 1507 microsoft:windows_10_1507	from 10.0.10240.0 before 10.0.10240.20232	CNA record
Microsoft Windows 10 Version 1607 microsoft:windows_10_1607	from 10.0.14393.0 before 10.0.14393.6351	CNA record
Microsoft Windows Server 2016 microsoft:windows_server_2016 (from the name)	from 10.0.14393.0 before 10.0.14393.6351	CNA record
1–10 of 27

References

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36584	vendor-advisory, patch
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-36584	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.