Windows Brokering File Systemに権限昇格の脆弱性、修正版を公開
Summary
Windows Brokering File Systemの不適切な権限設定により、認証済みの攻撃者が端末上で権限を昇格できる脆弱性（CVE-2026-85929、CVSS 7.8）が見つかりました。Windows 11 24H2・25H2・26H1・26H2とWindows Server 2025が対象で、いずれも修正版が公開されています。更新プログラムを適用してください。
AI summary
Produced by SecPulse using an external AI model; it may contain mistakes. Check the original description and references below before acting on it.
Windows Brokering File Systemの不適切な権限設定により、認証済みの攻撃者が端末上で権限を昇格できる脆弱性（CVE-2026-85929、CVSS 7.8）が見つかりました。Windows 11 24H2・25H2・26H1・26H2とWindows Server 2025が対象で、いずれも修正版が公開されています。更新プログラムを適用してください。
Affected packages
| Package | Affected → Fixed | |
|---|---|---|
| MicrosoftWindows 11 Version 24H2 |
≥ 10.0.26100.0, < 10.0.26100.9974→ 10.0.26100.9974 |
10.0.26100.9974 |
| MicrosoftWindows 11 Version 25H2 |
≥ 10.0.26200.0, < 10.0.26200.9974→ 10.0.26200.9974 |
10.0.26200.9974 |
| MicrosoftWindows 11 version 26H1 |
≥ 10.0.28000.0, < 10.0.28000.3501→ 10.0.28000.3501 |
10.0.28000.3501 |
| MicrosoftWindows 11 Version 26H2 |
≥ 10.0.26300.0, < 10.0.26300.9974→ 10.0.26300.9974 |
10.0.26300.9974 |
| MicrosoftWindows Server 2025 |
≥ 10.0.26100.0, < 10.0.26100.33822→ 10.0.26100.33822 |
10.0.26100.33822 |
| MicrosoftWindows Server 2025 (Server Core installation) |
≥ 10.0.26100.0, < 10.0.26100.33822→ 10.0.26100.33822 |
10.0.26100.33822 |
Original description The description as published by the source.
Incorrect permission assignment for critical resource in Windows Brokering File System allows an authorized attacker to elevate privileges locally.
Source: Microsoft Security Response Center Blog NVD GitHub Advisory
References
- web msrc.microsoft.com
- web nvd.nist.gov
- web github.com