CVE-2021-26892: microsoft windows_10
CVSS: 6.2v3.1MediumModified
Published 11-03-2021Last modified 19-08-2026
Vulnerability summary
CVE-2021-26892 is a medium (CVSS 6.2) vulnerability in microsoft windows_10. EPSS estimates a 1.31% chance of exploitation in the next 30 days, higher than 70.4% of scored vulnerabilities.
CVSS score
6.2/10
010
Medium · v3.1 (CVE.org)EPSS score
1.31%
0%100%
Low · +0.12 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 11-03-2021PublishedVulnerability first disclosed.
- 19-08-2026Last modifiedVulnerability information updated.
Description
Windows Extensible Firmware Interface Security Feature Bypass Vulnerability
CVSS metrics
3 scores · 2 sources · 2 versionsMedium 6.2Preferred score · CVE.org (CNA)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:P/RL:O/RC:CSourcesAll 2 agree
- NVDNIST6.2MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Low 2.1Preferred score · NVD (NIST)
AV:L/AC:L/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
1.31%
Chance of exploitation in the next 30 days
Percentile
70%
Versus all other CVEs
30-day change
+0.12 pp
From 1.20% on 21-09-2026
21-09-202621-10-2026
EPSS score1.31%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeNo weakness data has been published for this record.
Affected systems
Microsoft14 products
- windows_1020h2 | 1607 | 1803 | 1809 | 1909 | 2004
- windows 10 version 1607≥ 10.0.14393.0, < 10.0.14393.4283
- windows 10 version 1803≥ 10.0.0, < 10.0.17134.2087
- windows 10 version 1809≥ 10.0.17763.0, < 10.0.17763.1817 | ≥ 10.0.0, < 10.0.17763.1817
- windows 10 version 1909≥ 10.0.0, < 10.0.18363.1440
1 vendor · 14 products
References
3 links- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-26892X Refsource MISCX TransferredPatchVendor Advisory
- www.zerodayinitiative.com/advisories/ZDI-21-330/X Refsource MISCX TransferredThird Party AdvisoryVDB Entry