Command injection in Windows and Windows Server - CVE-2026-58635
Published: July 17, 2026
Vulnerability identifier: #VU137953
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-58635
CWE-ID: CWE-77
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Microsoft
Affected software:
Windows
Windows Server
Windows
Windows Server
Detailed vulnerability description
The vulnerability allows a local user to escalate privileges.
The vulnerability exists due to command injection in Windows Narrator Braille when processing special elements used in a command. A local user can inject crafted command elements to escalate privileges.
Successful exploitation can execute code in the security context of the NT AUTHORITY\Network Service account.
How to mitigate CVE-2026-58635
Install security update from vendor's website.