CVE-2024-38217
Microsoft Windows Mark of the Web (MOTW) Protection Mechanism Failure Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 1 October 2024). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
Windows Mark of the Web Security Feature Bypass Vulnerability
- CVSS 3.1
- 5.4 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L
- EPSS
- 10.03% probability · 96th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 10 September 2024 · due 1 October 2024
- Weakness
- CWE-693
- Affected
- microsoft/windows 10 1507 · microsoft/windows 10 1607 · microsoft/windows 10 1809 · microsoft/windows 10 21h2 · microsoft/windows 10 22h2 · microsoft/windows 11 21h2 · microsoft/windows 11 22h2 · microsoft/windows 11 23h2 · microsoft/windows 11 24h2 · microsoft/windows server 2008 · microsoft/windows server 2012 · microsoft/windows server 2016 · microsoft/windows server 2019 · microsoft/windows server 2022 · microsoft/windows server 2022 23h2
- Source
- secure@microsoft.com
EPSS 10.0% since 30 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
CISA notes
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-38217; https://nvd.nist.gov/vuln/detail/CVE-2024-38217
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-38217Patch, Vendor Advisory
- https://www.elastic.co/security-labs/dismantling-smart-app-controlExploit, Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-38217US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.