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High 7.0

Windows Overlay Filterの脆弱性で権限を昇格される恐れ

CVE-2026-121670 First seen on SecPulse

Summary

Windows Overlay Filterの競合状態により、認証済みの攻撃者が端末上で権限を昇格させられる脆弱性が公表されました。影響を受けるのはWindows 10 バージョン1607・1809・21H2・22H2とWindows 11 バージョン23H2・24H2です。各版の修正版が公開されているため、Windows Updateで最新の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 Overlay Filterの競合状態により、認証済みの攻撃者が端末上で権限を昇格させられる脆弱性が公表されました。影響を受けるのはWindows 10 バージョン1607・1809・21H2・22H2とWindows 11 バージョン23H2・24H2です。各版の修正版が公開されているため、Windows Updateで最新の更新プログラムを適用してください。

Affected packages

PackageAffected → Fixed
MicrosoftWindows 10 Version 1607
≥ 10.0.14393.0, < 10.0.14393.9688→ 10.0.14393.9688
MicrosoftWindows 10 Version 1809
≥ 10.0.17763.0, < 10.0.17763.9487→ 10.0.17763.9487
MicrosoftWindows 10 Version 21H2
≥ 10.0.19044.0, < 10.0.19044.7846→ 10.0.19044.7846
MicrosoftWindows 10 Version 22H2
≥ 10.0.19045.0, < 10.0.19045.7846→ 10.0.19045.7846
MicrosoftWindows 11 Version 23H2
≥ 10.0.22631.0, < 10.0.22631.7711→ 10.0.22631.7711
MicrosoftWindows 11 Version 24H2
≥ 10.0.26100.0, < 10.0.26100.9974→ 10.0.26100.9974
MicrosoftWindows 11 Version 25H2
≥ 10.0.26200.0, < 10.0.26200.9974→ 10.0.26200.9974
MicrosoftWindows 11 version 26H1
≥ 10.0.28000.0, < 10.0.28000.3501→ 10.0.28000.3501
MicrosoftWindows 11 Version 26H2
≥ 10.0.26300.0, < 10.0.26300.9974→ 10.0.26300.9974
MicrosoftWindows Server 2016
≥ 10.0.14393.0, < 10.0.14393.9688→ 10.0.14393.9688
MicrosoftWindows Server 2016 (Server Core installation)
≥ 10.0.14393.0, < 10.0.14393.9688→ 10.0.14393.9688
MicrosoftWindows Server 2019
≥ 10.0.17763.0, < 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
MicrosoftWindows Server 2022
≥ 10.0.20348.0, < 10.0.20348.5870→ 10.0.20348.5870
MicrosoftWindows Server 2025
≥ 10.0.26100.0, < 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
Original description The description as published by the source.

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Overlay Filter allows an authorized attacker to elevate privileges locally.

Source: Microsoft Security Response Center Blog NVD GitHub Advisory

References

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