Advisoriesby IbisMicrosoftCVE-2026-50302
Microsoft Windows Cryptographic Services: improper certificate validation
Fix: upgrade to 10.0.19044.7548 or later (7 fixed versions below)
Improper certificate validation in Windows Cryptographic Services allows an unauthorized attacker to bypass a security feature over a network.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Windows 10 Version 21H2 Product | >= 10.0.19044.0, < 10.0.19044.7548 | 10.0.19044.7548 |
| Windows 10 Version 22H2 Product | >= 10.0.19045.0, < 10.0.19045.7548 | 10.0.19045.7548 |
| Windows 11 Version 24H2 Product | >= 10.0.26100.0, < 10.0.26100.8875 | 10.0.26100.8875 |
| Windows 11 Version 25H2 Product | >= 10.0.26200.0, < 10.0.26200.8875 | 10.0.26200.8875 |
| Windows 11 version 26H1 Product | >= 10.0.28000.0, < 10.0.28000.2525 | 10.0.28000.2525 |
| Windows Server 2022 Product | >= 10.0.20348.0, < 10.0.20348.5386 | 10.0.20348.5386 |
| Windows Server 2025 Product | >= 10.0.26100.0, < 10.0.26100.33158 | 10.0.26100.33158 |
| Windows Server 2025 (Server Core installation) Product | >= 10.0.26100.0, < 10.0.26100.33158 | 10.0.26100.33158 |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-295