Description
CarbonFTP v1.4 uses insecure proprietary password encryption with a hard-coded weak encryption key. The key for local FTP server passwords is hard-coded in the binary.
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- Neowise CarbonFTP 1.4 - Insecure Proprietary Password Encryption EDB-48363 · remote · Apr 21, 2020
GitHub 1 repository
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Nefhara/CVE-2020-6857 ★ 0 · Sep 23, 2026
PoC CVE-2020-6857
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- http://hyp3rlinx.altervista.org
- https://seclists.org/bugtraq/2020/Jan/30
- http://packetstormsecurity.com/files/156015/Neowise-CarbonFTP-1.4-Insecure-Proprietary-Password-Encryption.html
- 20200121 Neowise CarbonFTP v1.4 / Insecure Proprietary Password Encryption / CVE-2020-6857 mailing-list
- 20200124 [UPDATED - POC] Neowise CarbonFTP v1.4 / Insecure Proprietary Password Encryption / CVE-2020-6857 mailing-list
- http://packetstormsecurity.com/files/157321/Neowise-CarbonFTP-1.4-Insecure-Proprietary-Password-Encryption.html