The vulnerability of the fds_sys_passDebugPasswd_ret() function in the libfds.so library of the Zyxel GS1900 series router microprogramming software allows a attacker to escalate their privileges.

The vulnerability of the fdssyspassDebugPasswdret function in the libfds.so library of the Zyxel GS1900 series router microprogramming software exists due to insufficient validation of input data. Exploiting this vulnerability can allow a remote attacker to gain increased privileges...

CVE-2019-15801: Use of Hard-coded Credentials

An issue was discovered on Zyxel GS1900 devices with firmware before 2.50AAHH.0C0. The firmware image contains encrypted passwords that are used to authenticate users wishing to access a diagnostics or password-recovery menu. Using the hardcoded cryptographic key found elsewhere in the firmware,...