Command injection in Microsoft Windows and Windows Server - CVE-2026-58635
Published: July 17, 2026 / Updated: September 4, 2026
Vulnerability identifier: #VU137953
CSH Severity: Low
CVSS v4: 4.8 [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]
CVE-ID: CVE-2026-58635
CWE-ID: CWE-77
Exploitation vector: Local access
Exploit availability:
Public exploit is available
Vulnerability details
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.
Affected software
Microsoft Windows
Windows Server
Windows Server
How to mitigate CVE-2026-58635
Install security update from vendor's website.
Microsoft Windows - addressed in versions 10 21H2 10.0.19044.7548, 10 22H2 10.0.19045.7548, 10 1809 10.0.17763.9020, 11 24H2 10.0.26100.8875, 11 26H1 10.0.28000.2525
Windows Server - addressed in versions 2012 R2 6.3.9600.23291, 2019 10.0.17763.9020, 2022 10.0.20348.5386, 2025 10.0.26100.33158
Windows Server - addressed in versions 2012 R2 6.3.9600.23291, 2019 10.0.17763.9020, 2022 10.0.20348.5386, 2025 10.0.26100.33158