CVE-2010-20121: Easyftp Server Project Easyftp Server

Critical severity, CVSS 9.8. EPSS: 4.6% chance of exploitation in the next 30 days.

EasyFTP Server versions up to 1.7.0.11 contain a stack-based buffer overflow vulnerability in the FTP command parser. When processing the CWD (Change Working Directory) command, the server fails to properly validate the length of the input string, allowing attackers to overwrite memory on the stack. This flaw enables remote code execution without authentication, as EasyFTP allows anonymous access by default. The vulnerability was resolved in version 1.7.0.12, after which the product was renamed “UplusFtp.”

Affected products

• Easyftp Server Project Easyftp Server: before 1.7.0.12 (fixed in 1.7.0.12)

Published 2025-08-21. Last modified 2026-06-16.