Windows
CVE-2026-20843
HIGH
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Improper access control in Windows Routing and Remote Access Service (RRAS) allows an authorized attacker to elevate privileges locally.
AnalysisAI
Local privilege escalation in Windows RRAS affects Windows 10, Windows 11, and Windows Server 2022, allowing authenticated users to gain system-level access through improper access control mechanisms. An attacker with local user credentials can exploit this vulnerability to obtain elevated privileges on the affected system. No patch is currently available, leaving vulnerable systems at risk until Microsoft releases a security update.
Technical ContextAI
Classified as CWE-284 (Improper Access Control). Affects Windows 10 1607. Improper access control in Windows Routing and Remote Access Service (RRAS) allows an authorized attacker to elevate privileges locally.
RemediationAI
Monitor vendor advisories for a patch.
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Same weakness CWE-284 – Improper Access Control
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External POC / Exploit Code
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