CVE-2026-58628 is a Windows Wireless Network Manager elevation of privilege vulnerability caused by a race condition. Microsoft rates it as CVSS v3.1 7.8 (HIGH) with a temporal score of 6.8, using vector AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H. Successful exploitation could let an attacker gain SYSTEM privileges. Microsoft says the issue is not publicly disclosed, not known to be exploited, and exploit code maturity is UNPROVEN. Because the attack is local and requires low privileges plus a race condition, it is a serious endpoint risk rather than a network-exposed service risk.

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 Less Likely; local vector with HIGH attack complexity, LOW privileges required, and NO user interaction
- Severity for enterprise: High severity on affected Windows systems, but real-world exposure is lower than for remotely exploitable vulnerabilities because the attack is local-only and requires winning a race condition
- Patch status: available

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