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

Is it exploited?

Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 16 Nov 2023, 37 days after the CVE record was published.

How likely is exploitation in the next 30 days?

3.3%

EPSS score, percentile 88.3 of all scored records

How severe?

5.4 Medium

CVSS v3.1 base score, given by the CNA

What should I do?

Required action (CISA), due 7 Dec 2023: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Advisories and patches (1)

Which versions are affected?

Affected: 10.0.17763.0 up to, not including, 10.0.17763.4974; 10.0.0 up to, not including, 10.0.17763.4974; 10.0.17763.0 up to, not including, 10.0.17763.4974; 10.0.17763.0 up to, not including, 10.0.17763.4974; 10.0.20348.0 up to, not including, 10.0.20348.2031; 10.0.0 up to, not including, 10.0.22000.2538; 10.0.19043.0 up to, not including, 10.0.19041.3570; 10.0.22621.0 up to, not including, 10.0.22621.2428; 10.0.19045.0 up to, not including, 10.0.19045.3570; 10.0.10240.0 up to, not including, 10.0.10240.20232; 10.0.14393.0 up to, not including, 10.0.14393.6351; 10.0.14393.0 up to, not including, 10.0.14393.6351; 10.0.14393.0 up to, not including, 10.0.14393.6351; 6.0.6003.0 up to, not including, 6.0.6003.22317; 6.0.6003.0 up to, not including, 6.0.6003.22317; 6.0.6003.0 up to, not including, 6.0.6003.22317; 6.1.7601.0 up to, not including, 6.1.7601.26769; 6.1.7601.0 up to, not including, 6.1.7601.26769; 6.2.9200.0 up to, not including, 6.2.9200.24523; 6.2.9200.0 up to, not including, 6.2.9200.24523

Versions by product

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

What to do

CISA due date for this action: 7 December 2023.

Advisories and patches

• Windows Mark of the Web Security Feature Bypass Vulnerability (Vendor advisory)

Linked from CISA's catalog entry

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36584
• https://nvd.nist.gov/vuln/detail/CVE-2023-36584

Affected products and versions

As listed in the CVE record.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

About this vulnerability

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.

Summary: CISA's KEV catalog, as of 28 Oct 2026.

• CISA added CVE-2023-36584 to its Known Exploited Vulnerabilities (KEV) catalog on 16 Nov 2023.
• CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
• The due date CISA sets for the required action is 7 Dec 2023.
• The CVE record was published on 10 Oct 2023, 37 days before it was added to KEV.
• The CVE record carries a CVSS v3.1 base score of 5.4 (Medium), given by its CNA.
• FIRST's EPSS model puts the probability of exploitation in the next 30 days at 3.3% (percentile 88.3), as of 28 Oct 2026.
• CISA's SSVC assessment in the CVE record: exploitation active, automatable no, technical impact total.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.

Description

Windows Mark of the Web Security Feature Bypass Vulnerability

Windows Mark of the Web Security Feature Bypass Vulnerability

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

Timeline

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