CVE-2021-31205 json
Windows SMB Client Security Feature Bypass Vulnerability
published 2021-05-11 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-18118
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.9%
- EPSS 2.9% chance of exploitation in 30 days, percentile 87%
- public exploits
- 0
- none known
Summary
Windows SMB Client Security Feature Bypass Vulnerability
Patch / fix
- Microsoft Windows 10 Version 2004 10.0.19041.982
- Microsoft Windows Server version 2004 10.0.19041.982
- Microsoft Windows 10 Version 20H2 10.0.19042.982
- Microsoft Windows Server version 20H2 10.0.19042.982
Exploit prediction
2.91% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C |
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N |
| NVD | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:P/I:N/A:N |
Affected products
- Microsoft Windows 10 Version 2004
- Microsoft Windows Server version 2004
- Microsoft Windows 10 Version 20H2
- Microsoft Windows Server version 20H2
References
-
portal.msrc.microsoft.com
/en-US/security-guidance/advisory/CVE-2021-31205
patch, vendor-advisory
Sources
- CVE List CVE-2021-31205
- NVD CVE-2021-31205
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