Privilege escalation in Windows IME

Published: 2017-07-11
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2017-8566
Exploitation vector Local
Public exploit N/A
Vulnerable software
Operating systems & Components / Operating system

Windows Server
Operating systems & Components / Operating system

Vendor Microsoft

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Improper input validation


Risk: Low


CVE-ID: CVE-2017-8566

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No


The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists Windows Input Method Editor (IME) when IME improperly handles parameters in a method of a DCOM class. A local user can execute arbitrary code on the target system with elevated privileges.

Note: The attacker can instantiate the DCOM class and exploit the system even if IME is not enabled.


Install updates from vendor's website.

Vulnerable software versions

Windows: 10 - 10

Windows Server: 2016 - 2016

CPE2.3 External links

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?