CVE-2026-58635 is a Windows Narrator Braille elevation of privilege vulnerability caused by improper neutralization of special elements used in a command. Microsoft rates it High severity with a CVSS v3.1 base score of 7.8 and temporal score of 6.8. The attack vector is LOCAL, requires LOW privileges, and no user interaction. If successfully exploited, an attacker could execute code in the security context of NT AUTHORITY\Network Service. Microsoft reports no public disclosure and no known exploitation; exploit code maturity is UNPROVEN. Because this is a local privilege escalation issue, it is more relevant to systems where untrusted local code or users are present than to network-exposed services.

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; vector context is LOCAL, LOW attack complexity, LOW privileges required, and NO user interaction.
- Severity for enterprise: High technical severity, but the local attack vector lowers exposure for remote enterprise services. Higher relevance exists on multi-user or internally accessible Windows systems where local execution is possible.
- Patch status: available; customer action required.

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