Microsoft · Windows

CVE-2022-24521

Microsoft Windows CLFS Driver Privilege Escalation Vulnerability

Evidence

Source & freshness

Full source status →

CISA KEV catalog Core KEV record

CVE, vendor/product, CISA dates, ransomware status, description, required action, and notes.

Catalog 2026.07.24 · Retrieved 2026-07-25 20:49 UTC Open official CISA feed ↗

MITRE CWE catalog CWE context

CWE names and plain-language weakness descriptions. CISA supplies the CWE assignment itself.

Retrieved 2026-07-25 20:59 UTC Open official MITRE CWE catalog ↗

National Vulnerability Database NVD technical context

CVSS metrics, NVD timeline, and related NVD record data are stored locally.

Retrieved Jul 25, 2026, 08:49 PM UTC Open NVD record ↗

CISA KEV record

CISA date added: 2022-04-13
CISA due date: 2022-05-04
Known ransomware use: Known

NVD risk context

7.8 HIGH

CVSS is a technical severity score. CISA’s KEV status remains the evidence that this vulnerability is known to be exploited.

View NVD record ↗

Attack vector

Local

An attacker needs local access to the affected system.

Attack complexity

Low

Exploitation does not require unusual conditions beyond normal attacker control.

Privileges required

Low

The attacker needs limited privileges before exploiting the issue.

User interaction

None

No action by another user is required.

Description

Microsoft Windows Common Log File System (CLFS) Driver contains an unspecified vulnerability that allows for privilege escalation.

Required action

Apply updates per vendor instructions.

NVD reference index

Vendor and remediation references

NVD has tagged these sources as vendor advisories, patches, mitigations, or release notes.

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-24521 ↗
PatchVendor Advisory NVD reference source: secure@microsoft.com

Other NVD references (1)

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-24521 ↗
US Government Resource NVD reference source: 134c704f-9b21-4f2e-91b3-4a467353bcc0

MITRE CWE context

CWE classification

CWE-787 Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

View official MITRE CWE details ↗

CWE-1285 Improper Validation of Specified Index, Position, or Offset in Input

The product receives input that is expected to specify an index, position, or offset into an indexable resource such as a buffer or file, but it does not validate or incorrectly validates that the specified index/position/offset has the required properties.

View official MITRE CWE details ↗

NVD record timing

NVD record timeline

These dates describe NVD’s record, not CISA’s KEV addition or remediation due date.

NVD published: Apr 15, 2022, 07:15 PM UTC
NVD last updated: Jun 17, 2026, 04:32 AM UTC

Advanced: view the technical CVSS vector

This standardized code is intended for security tools and technical analysts. The plain-language risk summary above explains its main points.

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

View NVD record ↗

CISA notes

https://nvd.nist.gov/vuln/detail/CVE-2022-24521

https://nvd.nist.gov/vuln/detail/CVE-2022-24521