CVE-2011-4040

Exp

Buffer overflow in MiniSmtp 3.0.11818 in NJStar Communicator allows remote attackers to execute arbitrary code via a crafted packet.

Published: 2011-11-21 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-4040 is rated High Exploit Risk (94/100): CVSS Critical severity, with high exploitation likelihood (EPSS 76.49%, 99th percentile). 2 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +4.41% 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-2011-4040

EDB-ID Source Kind Published Link
18196 exploit_db edb 2011-12-03 Exploit-DB ↗
18057 exploit_db edb 2011-10-31 Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2011-4040

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 2025-09-14 72.07% 76.49% +4.41%
2 2025-09-08 66.20% 72.07% +5.87%
3 2025-03-30 — 66.20% —

Full EPSS history (20 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-4040

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-2011-4040

Affected software / configurations for CVE-2011-4040

Vendor Product Version Raw CPE
njstar njstar_communicator 3.0.11818 cpe:2.3:a:njstar:njstar_communicator:3.0.11818:*:*:*:*:*:*:*

References for CVE-2011-4040

URL Tags
http://www.kb.cert.org/vuls/id/819630 US Government Resource
cvelogic Threat Intelligence