CVE-2021-38624: Windows Key Storage Provider Security Feature Bypass Vulnerability
Modified
Published 15-09-2021Last modified 10-08-2026
Vulnerability summary
CVE-2021-38624 is a medium (CVSS 6.5) vulnerability in microsoft windows_10. EPSS estimates a 1.53% chance of exploitation in the next 30 days, higher than 74.6% of scored vulnerabilities.
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)EPSS score
1.53%
0%100%
Low · +0.01 pp in 30 daysKEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded
Timeline
- 15-09-2021PublishedVulnerability first disclosed.
- 10-08-2026Last modifiedVulnerability information updated.
Description
Windows Key Storage Provider Security Feature Bypass Vulnerability
CVSS metrics
3 scores · 2 sources · 2 versionsMedium 6.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:CSourcesAll 2 agree
- NVDNIST6.5MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Medium 4.0Preferred score · NVD (NIST)
AV:N/AC:L/Au:S/C:N/I:P/A:NSourcesSingle source
EPSS trend
Probability
1.53%
Chance of exploitation in the next 30 days
Percentile
75%
Versus all other CVEs
30-day change
Increase +0.01 pp
From 1.52% on 22-09-2026
22-09-202622-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Microsoft13 products
- windows_1020h2 | 21h1 | 1809 | 1909 | 2004
- windows 10 version 1809≥ 10.0.17763.0, < 10.0.17763.2237 | ≥ 10.0.0, < 10.0.17763.2237
- windows 10 version 1909≥ 10.0.0, < 10.0.18363.1854
- windows 10 version 2004≥ 10.0.0, < 10.0.19041.1288
- windows 10 version 20h2≥ 10.0.0, < 10.0.19042.1288
1 vendor · 13 products
References
2 links
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-38624X Refsource MISCX TransferredPatchVendor Advisory