CVE-2026-50365: CWE-287: Improper Authentication in Microsoft Windows 10 Version 1607
Description
Improper authentication in Windows RPC API allows an unauthorized attacker to elevate privileges over an adjacent network.
CVSS v3.1
Score 8.0high
Affected software
Microsoft
Windows 10 Version 1607
Microsoft
Windows 10 Version 1809
Microsoft
Windows 10 Version 21H2
Microsoft
Windows 10 Version 22H2
Microsoft
Windows 11 Version 24H2
Microsoft
Windows 11 Version 25H2
Microsoft
Windows 11 version 26H1
Microsoft
Windows Server 2012
Microsoft
Windows Server 2012 (Server Core installation)
Microsoft
Windows Server 2012 R2
Microsoft
Windows Server 2012 R2 (Server Core installation)
Microsoft
Windows Server 2016
Microsoft
Windows Server 2016 (Server Core installation)
Microsoft
Windows Server 2019
Microsoft
Windows Server 2019 (Server Core installation)
Microsoft
Windows Server 2022
Microsoft
Windows Server 2025
Microsoft
Windows Server 2025 (Server Core installation)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-50365) is classified as CWE-287 (Improper Authentication) and affects Windows 10 Version 1607 (build 10.0.14393.0). The flaw exists in the Windows RPC API, permitting an attacker with network adjacency to bypass authentication controls and elevate privileges. The CVSS v3.1 base score is 8.0, indicating high severity, with attack vector being adjacent network, low attack complexity, no privileges required, and user interaction required. Confidentiality, integrity, and availability impacts are all high. Microsoft has published an official fix for this vulnerability.
Potential Impact
An attacker on an adjacent network can exploit this vulnerability to elevate privileges on the affected Windows 10 system. This could lead to full compromise of confidentiality, integrity, and availability of the system. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability. Users and administrators of Windows 10 Version 1607 (build 10.0.14393.0) should apply the provided security update as soon as possible to remediate the issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-04T18:48:26.815Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50365","vendor":"Microsoft"}]
Threat ID: 6a56769468715ace43f08d69
Added to database: 07/14/2026, 17:49:08 UTC
Last enriched: 08/13/2026, 14:40:57 UTC
Last updated: 10/13/2026, 18:57:37 UTC
Views: 87
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