high Known exploitedREV. 01

CVE-2024-21412Windows — an internet shortcut that raises no warning

A crafted internet shortcut file gets past a Windows safety check, so opening it produces none of the warning it should. Microsoft names no further detail, and the catalog records ransomware crews using this one.

YOUR NEXT MOVE

Install the February 2024 Windows update, and handle shortcut files from outside the organisation as executables — that is how they behave once this check is gone.

Read the risk

THE VITAL STATS
CVSS score
8.1/ 10
CVSS v3.1
EPSS probability
95%
Likelihood of exploitation
Attack complexity
Low
Conditions needed to exploit
Known exploited
Yes — CISA KEV
CVE published
2024-02-13
Added to KEV
2024-02-13
Exploit published
Not recorded
Confidence
medium
Kill chain
defense evasion
MITRE ATT&CK
T1553.005
Severity
high

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

Attacker needsThe user must open a shortcut file the attacker delivered.

Behind the card

3 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-2024-21412 · CRDS 0.1 · Issued 2026-09-24