YMS-VPN8 and YMS-VPN8-CP, VPN client software for Windows, register Windows services with unquoted file paths. A local user with write permissions on the system drive can place a program along the path and have it run with SYSTEM privileges. The attacker needs an existing local foothold, and the vulnerability is not network-exploitable.
Yamaha Corporation · YMS-VPN8 / YMS-VPN8-CP
The Yamaha NWR100 wireless LAN router firmware up to Rev.26.00.07 contains an OS command injection vulnerability (CWE-78). An attacker who sends a specially crafted request to the device can execute arbitrary OS commands without authentication. The web GUI must be reachable by the attacker, for example from a device on the LAN or Wi-Fi, because it is not exposed to the internet by default.
Yamaha Corporation · NWR100
The installer of Yamaha LAN Monitor for Windows up to version 1.9.3 loads Dynamic Link Libraries from an insecure search path. If the installer is started from a directory containing a specially crafted DLL, the DLL is loaded and code runs with administrative privileges. The attacker must place the file locally and the user must run the installer; the issue affects only installation and not already installed copies.
Yamaha Corporation · Yamaha LAN Monitor for Windows