ZynOS 3.40 allows remote malicious users to cause a denial of service (link restart) by sending a request for the name \M via the SMB Mail Slot Protocol.
source: wwwsecurityfocuscom/bid/23061/info
Zyxel Routers running the ZynOS operating system are prone to a remote denial-of-service vulnerability
An attacker can exploit this issue to crash the affected device, denying further network service to legitimate users
This issue affects Zyxel routers running ZynOS version 340
sr(SMBMail ...