CVE-2010-20121 CRITICAL

CVE-2010-20121: EasyFTP Server <= 1.7.0.11 CWD Command Stack Buffer Overflow

Vendor Kmint21 Software
Product EasyFTP Server
Weakness CWE-121
Published August 21, 2025
Last update May 15, 2026
View on NVD All CVEs

CVSS base score

9.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.”

Key dates

02Disclosure timeline

August 21, 2025 CVE published
May 15, 2026 Record updated