CVE-2024-21412: Microsoft Windows Internet Shortcut Files Security Feature Bypass Vulnerability

Is it exploited?

Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 13 Feb 2024, the same day the CVE record was published.

How likely is exploitation in the next 30 days?

99.4%

EPSS score, percentile 99.9 of all scored records

How severe?

8.1 High

CVSS v3.1 base score, given by the CNA

What should I do?

CISA deadline 5 Mar 2024. Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Advisories and patches (1)

Which versions are affected?

Affected

• from 10.0.0 to before 10.0.17763.5458
• from 10.0.17763.0 to before 10.0.17763.5458
• from 10.0.19043.0 to before 10.0.19044.4046
• from 10.0.19045.0 to before 10.0.19045.4046
• from 10.0.0 to before 10.0.22000.2777
• from 10.0.22621.0 to before 10.0.22621.3155

and 6 more in the table below

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

CISA due date for this action: 5 March 2024.

Advisories and patches

• Internet Shortcut Files Security Feature Bypass Vulnerability (Vendor advisory, Patch)

Linked from CISA's catalog entry

• https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2024-21412
• https://nvd.nist.gov/vuln/detail/CVE-2024-21412

Affected products and versions

As listed in the CVE record.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

About this vulnerability

Microsoft Windows Internet Shortcut Files contains an unspecified vulnerability that allows for a security feature bypass.

Summary: CISA's KEV catalog, as of 28 Oct 2026.

• CISA added CVE-2024-21412 to its Known Exploited Vulnerabilities (KEV) catalog on 13 Feb 2024.
• CISA marks it as known to be used in ransomware campaigns.
• The due date CISA sets for the required action is 5 Mar 2024.
• The CVE record was published on 13 Feb 2024, the same day it was added to KEV.
• The CVE record carries a CVSS v3.1 base score of 8.1 (High), given by its CNA.
• FIRST's EPSS model puts the probability of exploitation in the next 30 days at 99.4% (percentile 99.9), as of 28 Oct 2026.
• CISA's SSVC assessment in the CVE record: exploitation active, automatable no, technical impact total.

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

Internet Shortcut Files Security Feature Bypass Vulnerability

Internet Shortcut Files 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-693: Protection Mechanism Failure

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

Timeline

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