high7.5
CVE-2026-26154
Improper input validation in Windows Server Update Service allows an unauthorized attacker to perform tampering over a network.
Impact
Improper input validation in Windows Server Update Service allows an unauthorized attacker to perform tampering over a network.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Microsoft | Windows Server 2012 | All versions Version r2 |
| Microsoft | Windows Server 2016 | before 10.0.14393.9060 |
| Microsoft | Windows Server 2019 | before 10.0.17763.8644 |
| Microsoft | Windows Server 2022 | before 10.0.20348.5020 |
| Microsoft | Windows Server 2022 23h2 | before 10.0.25398.2274 |
| Microsoft | Windows Server 2025 | before 10.0.26100.32690 |