source: https://www.securityfocus.com/bid/1001/info
The Pragma Systems InterAccess TelnetID Server 4.0 can be crashed by sending invalid, unexpected characters in the client's terminal configuration settings. This causes telnetd.exe to GPF, and will cause the server to stop responding.
https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/19760-1.exe
https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/19760-2.zip