CVE-2021-47791

Name: CVE-2021-47791
Creator: NVD / NIST
Published: 2026-01-16T00:16:22.827+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.6/10EPSS 0.47%

Last modified Jun 17, 2026

CVE-2021-47791 is a medium-severity vulnerability rated 4.6/10 on the CVSS scale. SmartFTP Client 10.0.2909.0 contains multiple denial of service vulnerabilities that allow attackers to crash the application through specific input manipulation. Attackers can trigger crashes by entering malformed paths, using invalid IP addresses, or clearing connection history in the client's interface.. EPSS estimates a 0.47% chance of exploitation in the next 30 days.

Description

SmartFTP Client 10.0.2909.0 contains multiple denial of service vulnerabilities that allow attackers to crash the application through specific input manipulation. Attackers can trigger crashes by entering malformed paths, using invalid IP addresses, or clearing connection history in the client's interface.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS 4.0

4.6/10

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.47%

37.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-770

Affected Software

Vendor	Product	Versions
Smartftp	Smartftp	10.0.2909.0

References

https://www.exploit-db.com/exploits/50266Exploit
https://www.smartftp.com/en-us/Product
https://www.smartftp.com/en-us/downloadProduct
https://www.vulncheck.com/advisories/smartftp-client-multiple-denial-of-serviceThird Party Advisory
https://www.exploit-db.com/exploits/50266Exploit

Timeline

Published: Jan 16, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2021-47791?

How severe is CVE-2021-47791?

CVE-2021-47791 has a CVSS score of 4.6/10 (MEDIUM severity). The EPSS model estimates a 0.47% probability of exploitation in the next 30 days.

How do I fix CVE-2021-47791?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-47791?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST