CVE-2010-4221

Exp

Multiple stack-based buffer overflows in the pr_netio_telnet_gets function in netio.c in ProFTPD before 1.3.3c allow remote attackers to execute arbitrary code via vectors involving a TELNET IAC escape character to a (1) FTP or (2) FTPS server.

Published: 2010-11-09 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2010-4221 is rated High Exploit Risk (90.2/100): CVSS Critical severity, with high exploitation likelihood (EPSS 92.05%, 100th percentile). 5 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2010-4221

EDB-ID Source Kind Published Link
16851 exploit_db edb 2011-01-09 Exploit-DB ↗
16878 exploit_db edb 2010-12-02 Exploit-DB ↗
15449 exploit_db edb 2010-11-07 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2010-4221

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-05-21 91.75% 92.05% +0.30%
2 2026-05-04 91.09% 91.75% +0.66%
3 2026-03-04 — 91.09% —

Full EPSS history (63 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2010-4221

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
10.0 2.0 HIGH
AV:N/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 10.0 [email protected]

Weakness enumeration for CVE-2010-4221

OS Trackers for CVE-2010-4221

vendor priority summary link
debian not yet assigned CVE-2010-4221 not yet assigned priority: Debian including 1 source packages (proftpd-dfsg), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2010-4221
gentoo high CVE-2010-4221: 1 GLSA(s) (201309-15), 1 atom(s) (net-ftp/proftpd); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2010-4221
ubuntu high CVE-2010-4221 high priority: Ubuntu including 2 source packages (proftpd, proftpd-dfsg), 14 status rows across 7 suites (dapper, hardy, karmic, lucid, maverick, natty, upstream): DNE 6, released 4, not-affected 3, ignored 1. https://ubuntu.com/security/CVE-2010-4221

Affected software / configurations for CVE-2010-4221

Vendor Product Version Raw CPE
proftpd proftpd 1.3.2 cpe:2.3:a:proftpd:proftpd:1.3.2:*:*:*:*:*:*:*
proftpd proftpd 1.3.2 cpe:2.3:a:proftpd:proftpd:1.3.2:a:*:*:*:*:*:*
proftpd proftpd 1.3.2 cpe:2.3:a:proftpd:proftpd:1.3.2:b:*:*:*:*:*:*
proftpd proftpd 1.3.2 cpe:2.3:a:proftpd:proftpd:1.3.2:c:*:*:*:*:*:*
proftpd proftpd 1.3.2 cpe:2.3:a:proftpd:proftpd:1.3.2:d:*:*:*:*:*:*
proftpd proftpd 1.3.2 cpe:2.3:a:proftpd:proftpd:1.3.2:e:*:*:*:*:*:*
proftpd proftpd 1.3.2 cpe:2.3:a:proftpd:proftpd:1.3.2:rc3:*:*:*:*:*:*
proftpd proftpd 1.3.2 cpe:2.3:a:proftpd:proftpd:1.3.2:rc4:*:*:*:*:*:*
proftpd proftpd 1.3.3 cpe:2.3:a:proftpd:proftpd:1.3.3:*:*:*:*:*:*:*
proftpd proftpd 1.3.3 cpe:2.3:a:proftpd:proftpd:1.3.3:a:*:*:*:*:*:*
proftpd proftpd 1.3.3 cpe:2.3:a:proftpd:proftpd:1.3.3:b:*:*:*:*:*:*
proftpd proftpd 1.3.3 cpe:2.3:a:proftpd:proftpd:1.3.3:rc1:*:*:*:*:*:*
proftpd proftpd 1.3.3 cpe:2.3:a:proftpd:proftpd:1.3.3:rc2:*:*:*:*:*:*
proftpd proftpd 1.3.3 cpe:2.3:a:proftpd:proftpd:1.3.3:rc3:*:*:*:*:*:*
proftpd proftpd 1.3.3 cpe:2.3:a:proftpd:proftpd:1.3.3:rc4:*:*:*:*:*:*

References for CVE-2010-4221

cvelogic Threat Intelligence