CVE-2010-20121
CRITICALCVSS v3
9.8
CRITICAL
EPSS Score
68.6%
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.”
Technical Details
- Published
- 8/21/2025
Frequently Asked Questions
What is CVE-2010-20121?
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.”
Is CVE-2010-20121 actively exploited?
Active exploitation of CVE-2010-20121 has not been confirmed. The EPSS score is 68.6%, indicating the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2010-20121?
CVE-2010-20121 has a CVSS v3 base score of 9.8 (CRITICAL severity).
Is CVE-2010-20121 affecting your environment?
Use isMalicious to check if any of your IPs or domains are associated with this vulnerability's IOCs.