8.7
High
CVE-2026-27928 Improper input validation in Windows Hello allows an unauthorized attacker to bypass a security feature over a network
Description
Improper input validation in Windows Hello allows an unauthorized attacker to bypass a security feature over a network.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Windows Server 2016 10.0 | 10.0.14393.0 → < 10.0.14393.9060 | 10.0.14393.9060 |
| Windows Server 2016 (Server Core installation) 10.0 | 10.0.14393.0 → < 10.0.14393.9060 | 10.0.14393.9060 |
| Windows Server 2019 10.0 | 10.0.17763.0 → < 10.0.17763.8644 | 10.0.17763.8644 |
| Windows Server 2019 (Server Core installation) 10.0 | 10.0.17763.0 → < 10.0.17763.8644 | 10.0.17763.8644 |
| Windows Server 2022 10.0 | 10.0.20348.0 → < 10.0.20348.5020 | 10.0.20348.5020 |
| Windows Server 2022, 23H2 Edition (Server Core installation) 10.0 | 10.0.25398.0 → < 10.0.25398.2274 | 10.0.25398.2274 |
| Windows Server 2025 10.0 | 10.0.26100.0 → < 10.0.26100.32690 | 10.0.26100.32690 |
| Windows Server 2025 (Server Core installation) 10.0 | 10.0.26100.0 → < 10.0.26100.32690 | 10.0.26100.32690 |
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