Advisoriesby IbisMicrosoftCVE-2026-85866
Microsoft Windows ALPC: system information exposure
Fix: upgrade to 10.0.17763.9376 or later (9 fixed versions below)
Exposure of sensitive system information to an unauthorized control sphere in Windows ALPC allows an authorized attacker to disclose information locally.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| Windows 10 Version 1809 Product | >= 10.0.17763.0, < 10.0.17763.9376 | 10.0.17763.9376 |
| Windows 10 Version 21H2 Product | >= 10.0.19044.0, < 10.0.19044.7807 | 10.0.19044.7807 |
| Windows 10 Version 22H2 Product | >= 10.0.19045.0, < 10.0.19045.7807 | 10.0.19045.7807 |
| 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 2019 Product | >= 10.0.17763.0, < 10.0.17763.9376 | 10.0.17763.9376 |
| Windows Server 2019 (Server Core installation) Product | >= 10.0.17763.0, < 10.0.17763.9376 | 10.0.17763.9376 |
| Windows Server 2022 Product | >= 10.0.20348.0, < 10.0.20348.5761 | 10.0.20348.5761 |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-497