- 9.3CriticalCVSS base score
- 4.6%Exploitation in 30 daysEPSS · top 8.2% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- 1Public exploitsMetasploit, Nuclei and Exploit-DB
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.”
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list a Metasploit module for it. 7 references of the record are tagged as an exploit. CISA's SSVC rates its exploitation: a proof of concept is public.
Show the exploits8
Metasploit modules1 module
- EasyFTP Server CWD Command Stack Buffer Overflow (Metasploit module) (opens in a new tab)
exploit/windows/ftp/easyftp_cwd_fixretRank greatdisclosed 16 Feb 2010
References tagged exploit7 references
- https://seclists.org/bugtraq/2010/Feb/202 (opens in a new tab)third-party-advisoryexploit
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/ftp/easyftp_cwd_fixret.rb (opens in a new tab)exploit
- https://paulmakowski.wordpress.com/2010/02/28/increasing-payload-size-w-return-address-overwrite/ (opens in a new tab)technical-descriptionexploit
- https://www.exploit-db.com/exploits/12312 (opens in a new tab)exploit
- https://www.exploit-db.com/exploits/16737 (opens in a new tab)exploit
- https://www.exploit-db.com/exploits/11668 (opens in a new tab)exploit
- https://www.exploit-db.com/exploits/14402 (opens in a new tab)exploit
Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from
Timeline
ID reserved
By VulnCheck
- 1 day later
· 1 day later
Published
- 9 months later
· 9 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| VulnCheckCNA (assigner) | 4.0 | Critical9.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| NVDNVD · Analyzed | 4.0 | Critical9.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
- EPSS (exploitation in 30 days)
- 4.6% · top 8.2% of all CVEs (10 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: yes · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.3.
Affected products
KMiNT21 Software · EasyFTP Server
- affected ≤ 1.7.0.11
References
8
- https://seclists.org/bugtraq/2010/Feb/202 (opens in a new tab)third-party-advisoryexploit
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/windows/ftp/easyftp_cwd_fixret.rb (opens in a new tab)exploit
- https://paulmakowski.wordpress.com/2010/02/28/increasing-payload-size-w-return-address-overwrite/ (opens in a new tab)technical-descriptionexploit
- https://www.exploit-db.com/exploits/12312 (opens in a new tab)exploit
- https://www.exploit-db.com/exploits/16737 (opens in a new tab)exploit
- https://www.exploit-db.com/exploits/11668 (opens in a new tab)exploit
- https://www.exploit-db.com/exploits/14402 (opens in a new tab)exploit
- https://www.vulncheck.com/advisories/easyftp-server-cwd-command-stack-buffer-overflow (opens in a new tab)third-party-advisory
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2010-5310 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2010-20121)Record last updated .