Advisoriesby IbisMicrosoftCVE-2026-83507
Microsoft Windows Update Orchestrator Service: link following
Fix: upgrade to 10.0.19044.7807 or later (9 fixed versions below)
Improper link resolution before file access ('link following') in Windows Update Orchestrator Service allows an authorized attacker to disclose information locally.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| 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 2022 Product | >= 10.0.20348.0, < 10.0.20348.5761 | 10.0.20348.5761 |
| 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:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-59