medium Known exploitedREV. 01

CVE-2024-38217Windows — web-origin marking defeated on downloaded files

Windows can be made to drop the marking that tells it a file came from the internet, so the warnings and restrictions tied to that marking do not fire when the file is opened.

YOUR NEXT MOVE

Install the Microsoft update for this CVE now; exploit code is public, so treat downloaded documents as untrusted regardless of what the prompt says.

Read the risk

THE VITAL STATS
CVSS score
5.4/ 10
CVSS v3.1
EPSS probability
10%
Likelihood of exploitation
Attack complexity
Low
Conditions needed to exploit
Known exploited
Yes — CISA KEV
CVE published
2024-09-10
Added to KEV
2024-09-10
Exploit published
Yes
Confidence
high
Kill chain
defense evasion
MITRE ATT&CK
—
Severity
medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L

Attacker needsThe user must open a file the attacker prepared to lose its marking.

Behind the card

4 REFERENCES
Field-level provenanceTRACE THE SOURCES +

Which source supports each field, when it was retrieved, and who extracted it.

FieldsSourceRetrievedExtractorConfidence
cvss, exploitation.attack_complexity, exploitation.exploit_available, references, published_atnvd.nist.gov2026-09-24scrty-crds-pipeline/0.1high
exploitation.known_exploited, exploitation.kev_addedcisa.gov2026-09-24scrty-crds-pipeline/0.1high
epssapi.first.org2026-09-24scrty-crds-pipeline/0.1high
title, summary, severity, remediation, mitre_attack, kill_chain, recommended_action, confidence, tags, exploitation.prerequisitesnvd.nist.gov2026-09-24claude-codehigh

Printing history

THE RECORD
  1. r1Initial base card

First printing. This card has not been reprinted since publication.

crds:cve-2024-38217 · CRDS 0.1 · Issued 2026-09-24