Secunia Security Advisory – Sipera VIPER Lab has reported some vulnerabilities in Grandstream HandyTone HT488, which can be exploited by malicious people to cause a DoS (Denial of Service).
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/60461/sa27401.txt
Source: https://packetstormsecurity.com/files/60461/Secunia-Security-Advisory-27401.html