CVE-2024-38217: in the CISA KEV catalogue

Microsoft Windows Mark of the Web (MOTW) Protection Mechanism Failure Vulnerability. CISA added CVE-2024-38217 to the Known Exploited Vulnerabilities catalogue on 2024-09-10 with a default due date of 2024-10-01. Known ransomware campaign use: Unknown. Forensic triage flag: No.

Microsoft Windows Mark of the Web (MOTW) contains a protection mechanism failure vulnerability that allows an attacker to bypass MOTW-based defenses. This can result in a limited loss of integrity and availability of security features such as Protected View in Microsoft Office, which rely on MOTW tagging. (CISA description)

Vendor / product: Microsoft Windows
CWE: CWE-693
CISA required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
EPSS: 10%, percentile 95 (scored 2026-11-03)

EPSS puts about 10 in 100 odds (10%) on exploitation activity being observed in the next 30 days. Its score is higher than or equal to that of 95% of scored CVEs. This is a model estimate about exploitation anywhere, not about your environment.

Vendor and reference links (from CISA)

Your own deadline under CISA BOD 26-04 depends on exposure, automatability and technical impact: work it out with the BOD 26-04 calculator.

Data dates. CISA KEV catalogue version 2026.11.03, released 2026-11-03, 1,767 entries (checked 2026-11-03). EPSS model v2026.06.15, scored 2026-11-03, 399,388 CVEs. Sources: CISA and FIRST (EPSS by FIRST; scores generated by Empirical Security). Copied to our own database and refreshed automatically; if a refresh fails, the previous copy keeps serving with its own date.

Frequently asked questions

Is CVE-2024-38217 in the CISA KEV catalogue?

Yes. CISA added CVE-2024-38217 (Microsoft Windows Mark of the Web (MOTW) Protection Mechanism Failure Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2024-09-10. CISA's default due date for it is 2024-10-01.

Is CVE-2024-38217 used in ransomware attacks?

CISA marks known ransomware campaign use as Unknown for CVE-2024-38217. That means CISA lacks confirmation, not that ransomware groups do not use it.

What should I do about CVE-2024-38217?

CISA's required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Sources

CISA, Known Exploited Vulnerabilities Catalog (accessed 2026-11-03)
FIRST, Exploit Prediction Scoring System (EPSS) (EPSS by FIRST; scores generated by Empirical Security)
NVD record for CVE-2024-38217