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Vulnerabilities

Vulnerability · CVE-2010-20121

EasyFTP Server versions up to 1.7.0.11 contain a stack-based buffer overflow vulnerability in the FTP command parser.

Published Aug 21, 2025 · catalog updated May 15, 2026 · KMiNT21 Software EasyFTP Server

Last checked Oct 24, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2010-20121. EPSS is 4.63%. Act only if a listed version of KMiNT21 Software EasyFTP Server is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
Critical9.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
4.63%
Remediation
Vendor / distro source
Affected products
vendor KMiNT21 Software EasyFTP Server 0 ≤1.7.0.11

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.”

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor KMiNT21 Software EasyFTP Server 0 ≤1.7.0.110 ≤1.7.0.11

How to fix CVE-2010-20121

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2010-20121. EPSS is 4.63%. Act only if a listed version of KMiNT21 Software EasyFTP Server is installed.

Which versions are affected?

Compare what you have installed with KMiNT21 Software EasyFTP Server 0 ≤1.7.0.11 0 ≤1.7.0.11. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 4.63%. There is no CISA KEV listing. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 21, 2025 · EUVD

    Detected

    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

  2. May 15, 2026 · EUVD

    Updated

    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

Sources

  • CVE.orgVulnerability recordCVE-2010-20121

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2010-20121

    30-day exploitation probability 4.63%

    first.org
  • EUVDVulnerability recordEUVD-2010-5310

    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

    euvd.enisa.europa.eu
  • Metasploit ModulesPublic exploit moduleexploit_windows/ftp/easyftp_cwd_fixret

    Public module reference (great). Module source is not copied into this catalog.

    rapid7.com

References

Freshness

Last verified in this catalog Oct 24, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSOct 24, 2026
  • Metasploit ModulesOct 23, 2026
  • CVE.orgOct 21, 2026
  • EUVDOct 21, 2026