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cve 2026 20861

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CVE-2026-20861 is an Elevation of Privilege vulnerability in Windows Management Services (WMS), a management-plane component that runs with elevated privileges. Microsoft included this flaw in the January 13, 2026 Patch Tuesday rollup. Organizations operating administration hosts, jump boxes, or systems hosting management tooling should apply the update promptly. The vulnerability is registered in Microsoft's Security Update Guide and requires rapid but measured action to mitigate risk.
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    CVE-2026-20861 Elevation of Privilege in Windows Management Services Patch Tuesday

    Microsoft’s Security Update Guide registers CVE-2026-20861 as an Elevation of Privilege vulnerability in Windows Management Services (WMS) — a management‑plane component that routinely runs with elevated privileges — and the flaw was included in Microsoft’s January 13, 2026 Patch Tuesday rollup...
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    • cve 2026 20861 patch tuesday windows management services windows security
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