CVE-2026-50365 is an Improper Authentication vulnerability in the Remote Access Management service/API (RPC server) that can lead to Elevation of Privilege. Microsoft rates it High severity with a CVSS v3.1 base score of 8.0 and temporal score of 7.0. The vector is adjacent network, low attack complexity, no privileges required, and user interaction is required. If successfully exploited, an attacker could gain SYSTEM privileges, with high confidentiality, integrity, and availability impact. Microsoft says exploitation has not been publicly disclosed or observed, exploit code maturity is unproven, and customer action is required. Because the attack is limited to a logically adjacent topology and requires a user to actively connect and run a specific command, this is more constrained than a fully remote network attack, but it still presents meaningful enterprise risk on exposed or reachable management services.

Highlights:
- CVSS scores: Base 8.0 - Temporal 7.0
- Exploit status & code maturity: Publicly Disclosed: No; Exploited: No; Exploit Code Maturity: UNPROVEN.
- Impact: Elevation of Privilege; confidentiality, integrity, and availability impacts are all HIGH.
- Exploitation likelihood: Microsoft states Exploitation Less Likely; the vector is ADJACENT_NETWORK with LOW attack complexity, NO privileges required, and USER INTERACTION REQUIRED.
- Severity for enterprise: High severity, but enterprise risk is moderated by the adjacent-network requirement and required user interaction; it is most relevant where the affected management service is reachable within a trusted or internal network segment.
- Patch status: available; customer action is required.

Affected systems:
- Windows 10 1607
- Windows 10 1809
- Windows 10 21H2
- Windows 10 22H2
- Windows 11 24H2
- Windows 11 25H2
- Windows 11 26H1
- Windows 11 unspecified
- Windows Server 2012
- Windows Server 2012 R2
- Windows Server 2016
- Windows Server 2019
- Windows Server 2022
- Windows Server 2025