CVE-2026-50346 - Netlogon RPC Elevation of Privilege Vulnerability - is an improper authorization issue in Netlogon RPC that can allow a local attacker to gain SYSTEM privileges. Microsoft rates it CVSS v3.1 7.8 (High) with a temporal score of 6.8; the vector is LOCAL, LOW attack complexity, LOW privileges required, and no user interaction. Microsoft reports no public disclosure and no exploitation, with exploit code maturity UNPROVEN. Because the attack is local rather than network-based, enterprise risk is lower than a remotely reachable service, but successful exploitation would still result in full SYSTEM compromise on affected Windows systems.

Highlights:
- CVSS scores: Base 7.8 - Temporal 6.8
- 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: Exploitation Unlikely; local attack vector with LOW attack complexity, LOW privileges required, and NO user interaction.
- Severity for enterprise: High severity technically, but lower exposure than network-reachable vulnerabilities because exploitation requires local access. Risk is most relevant on systems where untrusted local users, code, or sessions are present.
- Patch status: available

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