Critical severity9.8NVD Advisory· Published Aug 21, 2025· Updated Jun 16, 2026
CVE-2010-20121
CVE-2010-20121
Description
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.”
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3- cpe:2.3:a:easyftp_server_project:easyftp_server:*:*:*:*:*:*:*:*Range: <1.7.0.12
- Range: <=1.7.0.11
- Range: *
Patches
Vulnerability mechanics
References
8- paulmakowski.wordpress.com/2010/02/28/increasing-payload-size-w-return-address-overwrite/nvdExploitThird Party Advisory
- raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/ftp/easyftp_cwd_fixret.rbnvdExploit
- seclists.org/bugtraq/2010/Feb/202nvdExploitMailing ListThird Party Advisory
- www.exploit-db.com/exploits/11668nvdExploitVDB Entry
- www.exploit-db.com/exploits/12312nvdExploitVDB Entry
- www.exploit-db.com/exploits/14402nvdExploitVDB Entry
- www.exploit-db.com/exploits/16737nvdExploitVDB Entry
- www.vulncheck.com/advisories/easyftp-server-cwd-command-stack-buffer-overflownvdThird Party Advisory
News mentions
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