CVE-2010-20121
criticalpriority · attend · 51EPSS 0.046 · 92 %ileexploit · weaponizedEUUSEPSS · scored 2026-10-28
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.”
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
exploits (1)
Public proof-of-concept and weaponised exploit code.
- exploit/windows/ftp/easyftp_cwd_fixretEasyFTP Server CWD Command Stack Buffer Overflowweaponized · metasploit
affected products (2)
Products and version ranges known to be affected.
- easyftp server project easyftp server< 1.7.0.12nvdUScpe:2.3:a:easyftp_server_project:easyftp_server:*:*:*:*:*:*:*:*
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (25)
External citations — patches, advisories, analysis.
- https://nvd.nist.gov/vuln/detail/CVE-2010-20121cnnvd
- https://paulmakowski.wordpress.com/2010/02/28/increasing-payload-size-w-return-address-overwrite/cnnvd
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/ftp/easyftp_cwd_fixret.rbcnnvd
- https://seclists.org/bugtraq/2010/Feb/202cnnvd
- https://www.exploit-db.com/exploits/11668cnnvd
- https://www.exploit-db.com/exploits/12312cnnvd
- https://www.exploit-db.com/exploits/14402cnnvd
- https://www.exploit-db.com/exploits/16737cnnvd
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