VulnTideExploited vulnerabilities, by vendor. Data as of 28 Oct 2026.
Known exploitedIn CISA's KEV catalog since 8 November 2022Ransomware use: known
Microsoft Windows

CVE-2022-41091: 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 8 Nov 2022, 1 day before the CVE record was published.

How likely is exploitation in the next 30 days?
1.9%

EPSS score, percentile 79.7 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 9 Dec 2022: Apply updates per vendor instructions.

Advisories and patches (1)

Which versions are affected?

Affected: 10.0.10240.0 up to, not including, 10.0.10240.19567; 10.0.14393.0 up to, not including, 10.0.14393.5501; 10.0.17763.0 up to, not including, 10.0.17763.3650; 10.0.0 up to, not including, 10.0.17763.3650; 10.0.0 up to, not including, 10.0.19042.2251; 10.0.0 up to, not including, 10.0.19043.2251; 10.0.19043.0 up to, not including, 10.0.19044.2251; 10.0.19045.0 up to, not including, 10.0.19045.2251; 10.0.0 up to, not including, 10.0.22000.1219; 10.0.22621.0 up to, not including, 10.0.22621.819; 10.0.14393.0 up to, not including, 10.0.14393.5501; 10.0.14393.0 up to, not including, 10.0.14393.5501; 10.0.17763.0 up to, not including, 10.0.17763.3650; 10.0.17763.0 up to, not including, 10.0.17763.3650; 10.0.20348.0 up to, not including, 10.0.20348.1249

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

Required action, set by CISA

Apply updates per vendor instructions.

CISA due date for this action: 9 December 2022.

Advisories and patches

Linked from CISA's catalog entry

Affected products and versions

As listed in the CVE record.

Microsoft Windows 10 Version 1507
StatusVersions
Affected10.0.10240.0 up to, not including, 10.0.10240.19567
Microsoft Windows 10 Version 1607
StatusVersions
Affected10.0.14393.0 up to, not including, 10.0.14393.5501
Microsoft Windows 10 Version 1809
StatusVersions
Affected10.0.17763.0 up to, not including, 10.0.17763.3650
Microsoft Windows 10 Version 1809
StatusVersions
Affected10.0.0 up to, not including, 10.0.17763.3650
Microsoft Windows 10 Version 20H2
StatusVersions
Affected10.0.0 up to, not including, 10.0.19042.2251
Microsoft Windows 10 Version 21H1
StatusVersions
Affected10.0.0 up to, not including, 10.0.19043.2251
Microsoft Windows 10 Version 21H2
StatusVersions
Affected10.0.19043.0 up to, not including, 10.0.19044.2251
Microsoft Windows 10 Version 22H2
StatusVersions
Affected10.0.19045.0 up to, not including, 10.0.19045.2251
Microsoft Windows 11 version 21H2
StatusVersions
Affected10.0.0 up to, not including, 10.0.22000.1219
Microsoft Windows 11 version 22H2
StatusVersions
Affected10.0.22621.0 up to, not including, 10.0.22621.819
Microsoft Windows Server 2016
StatusVersions
Affected10.0.14393.0 up to, not including, 10.0.14393.5501
Microsoft Windows Server 2016 (Server Core installation)
StatusVersions
Affected10.0.14393.0 up to, not including, 10.0.14393.5501
Microsoft Windows Server 2019
StatusVersions
Affected10.0.17763.0 up to, not including, 10.0.17763.3650
Microsoft Windows Server 2019 (Server Core installation)
StatusVersions
Affected10.0.17763.0 up to, not including, 10.0.17763.3650
Microsoft Windows Server 2022
StatusVersions
Affected10.0.20348.0 up to, not including, 10.0.20348.1249

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-2022-41091 to its Known Exploited Vulnerabilities (KEV) catalog on 8 Nov 2022.
  • CISA marks it as known to be used in ransomware campaigns.
  • The due date CISA sets for the required action is 9 Dec 2022.
  • The CVE record was published on 9 Nov 2022, 1 day after 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 1.9% (percentile 79.7), as of 28 Oct 2026.
  • CISA's SSVC assessment in the CVE record: exploitation active, automatable no, technical impact partial.

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.

Weakness

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.

Timeline

DateEvent
8 Nov 2022Added to CISA KEV
9 Nov 2022CVE record published
9 Dec 2022CISA due date for the required action
10 Aug 2026CVE record last updated

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