CVE-2011-5166

Exp

Multiple stack-based buffer overflows in KnFTP 1.0.0 allow remote attackers to execute arbitrary code via a long string to the (1) USER, (2) PASS, (3) REIN, (4) QUIT, (5) PORT, (6) PASV, (7) TYPE, (8) STRU, (9) MODE, (10) RETR, (11) STOR, (12) APPE, (13) ALLO, (14) REST, (15) RNFR, (16) RNTO, (17) ABOR, (18) DELE, (19) CWD, (20) LIST, (21) NLST, (22) SITE, (23) STST, (24) HELP, (25) NOOP, (26) MKD, (27) RMD, (28) PWD, (29) CDUP, (30) STOU, (31) SNMT, (32) SYST, and (33) XPWD commands.

Published: 2012-09-15 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-5166 is rated High Exploit Risk (84.1/100): CVSS High severity, with high exploitation likelihood (EPSS 41.79%, 97th percentile). 9 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +8.55% over the last day, indicating growing attacker interest. 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-2011-5166

EDB-ID Source Kind Published Link
18089 exploit_db edb 2011-11-07 Exploit-DB ↗
17870 exploit_db edb 2011-09-19 Exploit-DB ↗
17856 exploit_db edb 2011-09-18 Exploit-DB ↗
17819 exploit_db edb 2011-09-12 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
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Exploit prediction scoring system (EPSS) score for CVE-2011-5166

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 2026-05-17 33.24% 41.79% +8.55%
2 2026-04-11 20.52% 33.24% +12.72%
3 2025-07-30 — 20.52% —

Full EPSS history (16 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-5166

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P 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:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2011-5166

Affected software / configurations for CVE-2011-5166

Vendor Product Version Raw CPE
elif_keir knftp 1.0.0 cpe:2.3:a:elif_keir:knftp:1.0.0:*:*:*:*:*:*:*

References for CVE-2011-5166

cvelogic Threat Intelligence