Windows 10・Windows 11・Windows Serverのサービススタック更新の脆弱性、権限を昇格される
Summary
Servicing Stack Updates（SSU）に、認可された攻撃者がローカルで権限を昇格されるおそれのある脆弱性（CVE-2026-88235）が見つかりました。CVSS v3のスコアは7.8で、Windows 10 Version 1607・1809・21H2・22H2、Windows 11 Version 23H2、Windows Server 2016が対象です。各版の修正版（例: Windows 10 Version 22H2は10.0.19045.7846）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.
Servicing Stack Updates（SSU）に、認可された攻撃者がローカルで権限を昇格されるおそれのある脆弱性（CVE-2026-88235）が見つかりました。CVSS v3のスコアは7.8で、Windows 10 Version 1607・1809・21H2・22H2、Windows 11 Version 23H2、Windows Server 2016が対象です。各版の修正版（例: Windows 10 Version 22H2は10.0.19045.7846）を適用してください。
Affected packages
| Package | Affected → Fixed | |
|---|---|---|
| MicrosoftWindows 10 Version 1607 |
≥ 10.0.14393.0, < 10.0.14393.9681→ 10.0.14393.9681 |
10.0.14393.9681 |
| MicrosoftWindows 10 Version 1809 |
≥ 10.0.17763.0, < 10.0.17763.9487→ 10.0.17763.9487 |
10.0.17763.9487 |
| MicrosoftWindows 10 Version 21H2 |
≥ 10.0.19044.0, < 10.0.19044.7846→ 10.0.19044.7846 |
10.0.19044.7846 |
| MicrosoftWindows 10 Version 22H2 |
≥ 10.0.19045.0, < 10.0.19045.7846→ 10.0.19045.7846 |
10.0.19045.7846 |
| MicrosoftWindows 11 Version 23H2 |
≥ 10.0.22631.0, < 10.0.22631.7711→ 10.0.22631.7711 |
10.0.22631.7711 |
| MicrosoftWindows Server 2016 |
≥ 10.0.14393.0, < 10.0.14393.9681→ 10.0.14393.9681 |
10.0.14393.9681 |
| MicrosoftWindows Server 2016 (Server Core installation) |
≥ 10.0.14393.0, < 10.0.14393.9681→ 10.0.14393.9681 |
10.0.14393.9681 |
| MicrosoftWindows Server 2019 |
≥ 10.0.17763.0, < 10.0.17763.9487→ 10.0.17763.9487 |
10.0.17763.9487 |
| MicrosoftWindows Server 2019 (Server Core installation) |
≥ 10.0.17763.0, < 10.0.17763.9487→ 10.0.17763.9487 |
10.0.17763.9487 |
| MicrosoftWindows Server 2022 |
≥ 10.0.20348.0, < 10.0.20348.5870→ 10.0.20348.5870 |
10.0.20348.5870 |
Original description The description as published by the source.
Unintended proxy or intermediary ('confused deputy') in Servicing Stack Updates 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