CVE-2006-4364

Exp

Multiple heap-based buffer overflows in the POP3 server in Alt-N Technologies MDaemon before 9.0.6 allow remote attackers to cause a denial of service (daemon crash) and possibly execute arbitrary code via long strings that contain '@' characters in the (1) USER and (2) APOP commands.

Published: 2006-08-27 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2006-4364 is rated High Exploit Risk (69.9/100): CVSS Medium severity, with high exploitation likelihood (EPSS 69.17%, 99th percentile). 4 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-2006-4364

EDB-ID Source Kind Published Link
2258 exploit_db edb 2006-08-26 Exploit-DB ↗
2245 exploit_db edb 2006-08-22 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2006-4364

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 2025-07-28 68.73% 69.17% +0.44%
2 2025-04-13 68.08% 68.73% +0.65%
3 2025-03-30 — 68.08% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2006-4364

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/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:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2006-4364

Affected software / configurations for CVE-2006-4364

Vendor Product Version Raw CPE
alt-n mdaemon 2.8 cpe:2.3:a:alt-n:mdaemon:2.8:*:*:*:*:*:*:*
alt-n mdaemon 2.8.5.0 cpe:2.3:a:alt-n:mdaemon:2.8.5.0:*:*:*:*:*:*:*
alt-n mdaemon 2.71_sp1 cpe:2.3:a:alt-n:mdaemon:2.71_sp1:*:*:*:*:*:*:*
alt-n mdaemon 3.0.3 cpe:2.3:a:alt-n:mdaemon:3.0.3:*:*:*:*:*:*:*
alt-n mdaemon 3.0.4 cpe:2.3:a:alt-n:mdaemon:3.0.4:*:*:*:*:*:*:*
alt-n mdaemon 3.1.1 cpe:2.3:a:alt-n:mdaemon:3.1.1:*:*:*:*:*:*:*
alt-n mdaemon 3.1.2 cpe:2.3:a:alt-n:mdaemon:3.1.2:*:*:*:*:*:*:*
alt-n mdaemon 3.1_beta cpe:2.3:a:alt-n:mdaemon:3.1_beta:*:*:*:*:*:*:*
alt-n mdaemon 3.5.0 cpe:2.3:a:alt-n:mdaemon:3.5.0:*:*:*:*:*:*:*
alt-n mdaemon 3.5.1 cpe:2.3:a:alt-n:mdaemon:3.5.1:*:*:*:*:*:*:*
alt-n mdaemon 3.5.4 cpe:2.3:a:alt-n:mdaemon:3.5.4:*:*:*:*:*:*:*
alt-n mdaemon 3.5.4 cpe:2.3:a:alt-n:mdaemon:3.5.4:*:pro:*:*:*:*:*
alt-n mdaemon 3.5.4 cpe:2.3:a:alt-n:mdaemon:3.5.4:*:standard:*:*:*:*:*
alt-n mdaemon 3.5.6 cpe:2.3:a:alt-n:mdaemon:3.5.6:*:*:*:*:*:*:*
alt-n mdaemon 5.0 cpe:2.3:a:alt-n:mdaemon:5.0:*:*:*:*:*:*:*
alt-n mdaemon 5.0 cpe:2.3:a:alt-n:mdaemon:5.0:*:pro:*:*:*:*:*
alt-n mdaemon 5.0.1 cpe:2.3:a:alt-n:mdaemon:5.0.1:*:*:*:*:*:*:*
alt-n mdaemon 5.0.2 cpe:2.3:a:alt-n:mdaemon:5.0.2:*:*:*:*:*:*:*
alt-n mdaemon 5.0.3 cpe:2.3:a:alt-n:mdaemon:5.0.3:*:*:*:*:*:*:*
alt-n mdaemon 5.0.4 cpe:2.3:a:alt-n:mdaemon:5.0.4:*:*:*:*:*:*:*
alt-n mdaemon 5.0.5 cpe:2.3:a:alt-n:mdaemon:5.0.5:*:*:*:*:*:*:*
alt-n mdaemon 5.0.6 cpe:2.3:a:alt-n:mdaemon:5.0.6:*:*:*:*:*:*:*
alt-n mdaemon 5.0.7 cpe:2.3:a:alt-n:mdaemon:5.0.7:*:*:*:*:*:*:*
alt-n mdaemon 6.0 cpe:2.3:a:alt-n:mdaemon:6.0:*:*:*:*:*:*:*
alt-n mdaemon 6.0.5 cpe:2.3:a:alt-n:mdaemon:6.0.5:*:*:*:*:*:*:*
alt-n mdaemon 6.0.6 cpe:2.3:a:alt-n:mdaemon:6.0.6:*:*:*:*:*:*:*
alt-n mdaemon 6.0.7 cpe:2.3:a:alt-n:mdaemon:6.0.7:*:*:*:*:*:*:*
alt-n mdaemon 6.5.0 cpe:2.3:a:alt-n:mdaemon:6.5.0:*:*:*:*:*:*:*
alt-n mdaemon 6.5.1 cpe:2.3:a:alt-n:mdaemon:6.5.1:*:*:*:*:*:*:*
alt-n mdaemon 6.5.2 cpe:2.3:a:alt-n:mdaemon:6.5.2:*:*:*:*:*:*:*
alt-n mdaemon 6.7.5 cpe:2.3:a:alt-n:mdaemon:6.7.5:*:*:*:*:*:*:*
alt-n mdaemon 6.7.9 cpe:2.3:a:alt-n:mdaemon:6.7.9:*:*:*:*:*:*:*
alt-n mdaemon 6.8.0 cpe:2.3:a:alt-n:mdaemon:6.8.0:*:*:*:*:*:*:*
alt-n mdaemon 6.8.1 cpe:2.3:a:alt-n:mdaemon:6.8.1:*:*:*:*:*:*:*
alt-n mdaemon 6.8.2 cpe:2.3:a:alt-n:mdaemon:6.8.2:*:*:*:*:*:*:*
alt-n mdaemon 6.8.3 cpe:2.3:a:alt-n:mdaemon:6.8.3:*:*:*:*:*:*:*
alt-n mdaemon 6.8.4 cpe:2.3:a:alt-n:mdaemon:6.8.4:*:*:*:*:*:*:*
alt-n mdaemon 6.8.5 cpe:2.3:a:alt-n:mdaemon:6.8.5:*:*:*:*:*:*:*
alt-n mdaemon 7.2 cpe:2.3:a:alt-n:mdaemon:7.2:*:*:*:*:*:*:*
alt-n mdaemon 8.1.1 cpe:2.3:a:alt-n:mdaemon:8.1.1:*:*:*:*:*:*:*
alt-n mdaemon 8.1.3 cpe:2.3:a:alt-n:mdaemon:8.1.3:*:*:*:*:*:*:*
alt-n mdaemon 8.1.4 cpe:2.3:a:alt-n:mdaemon:8.1.4:*:*:*:*:*:*:*
alt-n mdaemon 9.0.1 cpe:2.3:a:alt-n:mdaemon:9.0.1:*:*:*:*:*:*:*
alt-n mdaemon 9.0.2 cpe:2.3:a:alt-n:mdaemon:9.0.2:*:*:*:*:*:*:*
alt-n mdaemon 9.0.3 cpe:2.3:a:alt-n:mdaemon:9.0.3:*:*:*:*:*:*:*
alt-n mdaemon 9.0.4 cpe:2.3:a:alt-n:mdaemon:9.0.4:*:*:*:*:*:*:*
alt-n mdaemon 9.0.5 cpe:2.3:a:alt-n:mdaemon:9.0.5:*:*:*:*:*:*:*

References for CVE-2006-4364

cvelogic Threat Intelligence