7.8

CVE-2022-24521: Microsoft Windows CLFS Driver Privilege Escalation Vulnerability

CVSS: 7.8v3.1HighKEVRansomwareAnalyzed
Published 15-04-2022Last modified 21-10-2025
Open JSON

Vulnerability summary

CVE-2022-24521 is a high (CVSS 7.8) Out-of-bounds Write vulnerability in Microsoft Windows. It is known to be exploited: CISA lists it, first on 13-04-2022. It has been used in ransomware campaigns. EPSS estimates a 7.13% chance of exploitation in the next 30 days, higher than 94.2% of scored vulnerabilities.

Overall risk
90/100
0100
Critical · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
7.13%
0%100%
Low · 0.00 pp in 30 days
KEVListedCISA
RansomwareKnown useFlagged by CISA
Public exploits0No public exploits recorded

Timeline

  1. 13-04-2022
    Added to CISA KEVMicrosoft Windows CLFS Driver Privilege Escalation Vulnerability
  2. 15-04-2022
    PublishedVulnerability first disclosed.
  3. 04-05-2022
    CISA remediation dueApply updates per vendor instructions.
  4. 21-10-2025
    Last modifiedVulnerability information updated.

Description

Windows Common Log File System Driver Elevation of Privilege Vulnerability

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

7.13%

Chance of exploitation in the next 30 days

Percentile

94%

Versus all other CVEs

30-day change

0.00 pp

From 7.13% on 20-09-2026

20-09-202620-10-2026
EPSS score
7.13%

Known exploited

Compare KEV catalogs
CISA KEVListed
Added
13-04-2022
Federal due date
04-05-2022
Ransomware

CISA required action

Apply updates per vendor instructions. nvd.nist.gov/vuln/detail/CVE-2022-24521

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Microsoft37 products

1 vendor · 37 products

References

2 links