EasyFTP Server <= 1.7.0.11 CWD Command Stack Buffer Overflow
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.
Summary
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.”
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| KMiNT21 Software | EasyFTP Server | up to 1.7.0.11 | — | No fix listed | CNA |
- EasyFTP Server VendorKMiNT21 Software Affected up to 1.7.0.11 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:easyftp_server_project:easyftp_server:*:*:*:*:*:*:*:* | before 1.7.0.12 | Vulnerable | Easyftp Server Project |
- cpe:2.3:a:easyftp_server_project:easyftp_server:*:*:*:*:*:*:*:* Versions before 1.7.0.12 Vulnerable ·Easyftp Server Project
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2010-20121
- 2026-10-03 Alias added: GHSA-p9m6-qf43-qh47
- 2026-10-11 EPSS moved to the 90th–95th percentile
References
Exploit 7
- https://seclists.org/bugtraq/2010/Feb/202
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/ftp/easyftp_cwd_fixret.rb
- https://paulmakowski.wordpress.com/2010/02/28/increasing-payload-size-w-return-address-overwrite/
- https://www.exploit-db.com/exploits/12312
- https://www.exploit-db.com/exploits/16737
- https://www.exploit-db.com/exploits/11668
- https://www.exploit-db.com/exploits/14402
More KMiNT21 Software vulnerabilities
- TI-2010-05067 EasyFTP Server list.html path Stack Buffer Overflow CVSS 4.0CRITICAL 9.3
- TI-2005-00517 Buffer overflow in Golden FTP Server Pro (goldenftpd) 2.x allows remote attackers to… CVSS 2.0HIGH 7.5
- TI-2005-04286 Buffer overflow in Golden FTP Server 1.92 allows remote attackers to execute arbitrary… CVSS 2.0HIGH 7.5
- TI-2005-00584 Buffer overflow in Golden FTP Server 1.92 allows remote attackers to execute arbitrary code via a long USER command. CVSS 2.0HIGH 7.5
- TI-2006-02124 Buffer overflow in Golden FTP Server Pro 2.70 allows remote attackers to cause a denial… CVSS 2.0MEDIUM 6.4
- TI-2005-01407 Golden FTP Server Pro 2.52 allows remote attackers to obtain sensitive information via a… CVSS 2.0MEDIUM 5.0
Sources
- CVE-2010-20121 · CVE Program
- CVE-2010-20121 · NVD
- FIRST EPSS
- GHSA-p9m6-qf43-qh47 · GitHub Advisory Database · CC BY 4.0
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