CVE-2021-43893: microsoft windows_10 Exposure of Resource to Wrong Sphere
CVSS: 7.5v3.1HighModified
Published 15-12-2021Last modified 04-08-2024
Vulnerability summary
CVE-2021-43893 is a high (CVSS 7.5) Exposure of Resource to Wrong Sphere vulnerability in microsoft windows_10. EPSS estimates a 6.72% chance of exploitation in the next 30 days, higher than 93.8% of scored vulnerabilities.
CVSS score
7.5/10
010
High · v3.1 (CVE.org)EPSS score
6.72%
0%100%
Low · +0.10 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 15-12-2021PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
Windows Encrypting File System (EFS) Elevation of Privilege Vulnerability
CVSS metrics
3 scores · 2 sources · 2 versionsHigh 7.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:CSourcesAll 2 agree
- NVDNIST7.5HighCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Medium 6.0Preferred score · NVD (NIST)
AV:N/AC:M/Au:S/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
6.72%
Chance of exploitation in the next 30 days
Percentile
94%
Versus all other CVEs
30-day change
+0.10 pp
From 6.62% on 20-09-2026
20-09-202620-10-2026
EPSS score6.72%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Microsoft33 products
- windows_10na | 20h2 | 21h1 | 21h2 | 1607 | 1809 | 1909 | 2004
- windows 10 version 1507≥ 10.0.0, < 10.0.10240.19145
- windows 10 version 1607≥ 10.0.0, < 10.0.14393.4825
- windows 10 version 1809≥ 10.0.0, < 10.0.17763.2366
- windows 10 version 1909≥ 10.0.0, < 10.0.18363.1977
1 vendor · 33 products
References
2 links
portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43893X Refsource MISCPatchVendor Advisory