CVE-2021-31955
MediumActively exploited (CISA KEV)
Description
Windows Kernel Information Disclosure Vulnerability
SeverityMedium
CVSS5.5
Exploit probability—
Product
Microsoft Windows
PublishedJun 8, 2021
First seenJun 8, 2021
Added to KEVNov 3, 2021
Weakness typeCWE-497CWE-497
How to fix
CISA required action
Apply updates per vendor instructions.
CISA due date: Nov 17, 2021Update
- microsoft windows_10_180910.0.17763.1999 or later
- microsoft windows_10_190910.0.18363.1621 or later
- microsoft windows_10_200410.0.19041.1052 or later
- microsoft windows_10_20h210.0.19042.1052 or later
- microsoft windows_10_21h110.0.19043.1052 or later
- microsoft windows_server_200410.0.19041.1052 or later
- microsoft windows_server_201910.0.17763.1999 or later
- microsoft windows_server_20h210.0.19042.1052 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft windows_10_1809 | v < 10.0.17763.1999 | 10.0.17763.1999 |
| microsoft windows_10_1909 | v < 10.0.18363.1621 | 10.0.18363.1621 |
| microsoft windows_10_2004 | v < 10.0.19041.1052 | 10.0.19041.1052 |
| microsoft windows_10_20h2 | v < 10.0.19042.1052 | 10.0.19042.1052 |
| microsoft windows_10_21h1 | v < 10.0.19043.1052 | 10.0.19043.1052 |
| microsoft windows_server_2004 | v < 10.0.19041.1052 | 10.0.19041.1052 |
| microsoft windows_server_2019 | v < 10.0.17763.1999 | 10.0.17763.1999 |
| microsoft windows_server_20h2 | v < 10.0.19042.1052 | 10.0.19042.1052 |
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