Advisoriesby IbisMicrosoftCVE-2026-83906
Microsoft Windows Shell: spoofing
Fix: upgrade to 10.0.22631.7652 or later (6 fixed versions below)
Incorrect implementation of authentication algorithm in Windows Shell allows an unauthorized attacker to perform spoofing over a network.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Windows 11 Version 23H2 Product | >= 10.0.22631.0, < 10.0.22631.7652 | 10.0.22631.7652 |
| Windows 11 Version 24H2 Product | >= 10.0.26100.0, < 10.0.26100.9711 | 10.0.26100.9711 |
| Windows 11 Version 25H2 Product | >= 10.0.26200.0, < 10.0.26200.9711 | 10.0.26200.9711 |
| Windows 11 Version 26H2 Product | >= 10.0.26300.0, < 10.0.26300.9711 | 10.0.26300.9711 |
| Windows 11 version 23H2 Product | >= 10.0.22631.0, < 10.0.22631.7652 | 10.0.22631.7652 |
| Windows 11 version 26H1 Product | >= 10.0.28000.0, < 10.0.28000.3231 | 10.0.28000.3231 |
| Windows Server 2025 Product | >= 10.0.26100.0, < 10.0.26100.33650 | 10.0.26100.33650 |
| Windows Server 2025 (Server Core installation) Product | >= 10.0.26100.0, < 10.0.26100.33650 | 10.0.26100.33650 |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-303