CVE-2026-20812
Medium
Description
Improper input validation in Windows LDAP - Lightweight Directory Access Protocol allows an authorized attacker to perform tampering over a network.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Microsoft Windows
PublishedJan 13, 2026
First seenJan 13, 2026
Weakness typeCWE-20Improper input validation
How to fix
Update
- microsoft windows_10_160710.0.14393.8783 or later
- microsoft windows_10_180910.0.17763.8276 or later
- microsoft windows_10_21h210.0.19044.6809 or later
- microsoft windows_10_22h210.0.19045.6809 or later
- microsoft windows_11_23h210.0.22631.6491 or later
- microsoft windows_11_24h210.0.26100.7623 or later
- microsoft windows_11_25h210.0.26200.7623 or later
- microsoft windows_server_201610.0.14393.8783 or later
- microsoft windows_server_201910.0.17763.8276 or later
- microsoft windows_server_202210.0.20348.4648 or later
- microsoft windows_server_2022_23h210.0.25398.2092 or later
- microsoft windows_server_202510.0.26100.32230 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft windows_10_1607 | v < 10.0.14393.8783 | 10.0.14393.8783 |
| microsoft windows_10_1809 | v < 10.0.17763.8276 | 10.0.17763.8276 |
| microsoft windows_10_21h2 | v < 10.0.19044.6809 | 10.0.19044.6809 |
| microsoft windows_10_22h2 | v < 10.0.19045.6809 | 10.0.19045.6809 |
| microsoft windows_11_23h2 | v < 10.0.22631.6491 | 10.0.22631.6491 |
| microsoft windows_11_24h2 | v < 10.0.26100.7623 | 10.0.26100.7623 |
| microsoft windows_11_25h2 | v < 10.0.26200.7623 | 10.0.26200.7623 |
| microsoft windows_server_2016 | v < 10.0.14393.8783 | 10.0.14393.8783 |
| microsoft windows_server_2019 | v < 10.0.17763.8276 | 10.0.17763.8276 |
| microsoft windows_server_2022 | v < 10.0.20348.4648 | 10.0.20348.4648 |
| microsoft windows_server_2022_23h2 | v < 10.0.25398.2092 | 10.0.25398.2092 |
| microsoft windows_server_2025 | v < 10.0.26100.32230 | 10.0.26100.32230 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.