CVE-2026-115778

A flaw was found in Twisted. The Telnet service implementation fails to enforce a size limit on incoming data buffers during protocol option negotiation, which occurs before user authentication. An unauthenticated remote attacker can exploit this vulnerability by sending a continuous stream of...

Telnet NEW-ENVIRON Command Injection

Exploits the Telnet NEW-ENVIRON vulnerability CVE-1999-0047 by injecting commands into the USER environment variable during Telnet option negotiation. This spawns an interactive shell session that is managed by the framework. !/usr/bin/env python3 -- coding: utf-8 -- from kittysploit import from...

CVE-2023-27533

A vulnerability in input validation exists in curl 8.0 during communication using the TELNET protocol may allow an attacker to pass on maliciously crafted user name and "telnet options" during server negotiation. The lack of proper input scrubbing allows an attacker to send content or perform...

TELNET option IAC injection

curl supports communicating using the TELNET protocol and as a part of this it offers users to pass on username and "telnet options" for the server negotiation. Due to lack of proper input scrubbing and without it being the documented functionality, curl would pass on username and telnet options ...

CURL-CVE-2023-27533 TELNET option IAC injection

curl supports communicating using the TELNET protocol and as a part of this it offers users to pass on username and "telnet options" for the server negotiation. Due to lack of proper input scrubbing and without it being the documented functionality, curl would pass on username and telnet options ...

CVE-2023-27533

A vulnerability in input validation exists in curl 8.0 during communication using the TELNET protocol may allow an attacker to pass on maliciously crafted user name and "telnet options" during server negotiation. The lack of proper input scrubbing allows an attacker to send content or perform...

CVE-2021-40523

In Contiki 3.0, Telnet option negotiation is mishandled. During negotiation between a server and a client, the server may fail to give the WILL/WONT or DO/DONT response for DO and WILL commands because of improper handling of exception condition, which leads to property violations and denial of...

Design/Logic Flaw

In Contiki 3.0, Telnet option negotiation is mishandled. During negotiation between a server and a client, the server may fail to give the WILL/WONT or DO/DONT response for DO and WILL commands because of improper handling of exception condition, which leads to property violations and denial of...

CVE-2021-40523

In Contiki 3.0, Telnet option negotiation is mishandled. During negotiation between a server and a client, the server may fail to give the WILL/WONT or DO/DONT response for DO and WILL commands because of improper handling of exception condition, which leads to property violations and denial of...

CVE-2021-40523

CVE-2021-40523 affects Contiki 3.0, where Telnet option negotiation can mishandle WILL/WONT or DO/DONT responses due to improper handling of an exception condition. This can lead to property violations and denial of service because the server may send no response when a fixed buffer space for all...

CVE-2021-40523: Improper Check for Unusual or Exceptional Conditions

In Contiki 3.0, Telnet option negotiation is mishandled. During negotiation between a server and a client, the server may fail to give the WILL/WONT or DO/DONT response for DO and WILL commands because of improper handling of exception condition, which leads to property violations and denial of...