Denial of Service Vulnerabilities in SmartFTP Client by SmartFTP
CVE-2021-47791

4.6MEDIUM

Key Information:

Vendor

Smartftp

Status
Smartftp Client
Vendor
CVE Published:
15 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2021-47791?

The SmartFTP Client version 10.0.2909.0 has multiple vulnerabilities that allow attackers to exploit the application through denial of service attacks. By manipulating specific inputs, such as entering malformed file paths, using invalid IP addresses, or altering the connection history, attackers can crash the client application. This vulnerability can disrupt user experience and potentially lead to service unavailability.

Affected Version(s)

SmartFTP Client 10.0.2909.0 (32 and 64 bit)

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2021-47791 - Proof of Concept

References

https://www.exploit-db.com/exploits/50266
exploit
https://www.smartftp.com/en-us/
product
https://www.smartftp.com/en-us/download
product

CVSS V4

Score:
4.6
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Eric Salario
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