CVE-2006-5176

Buffer overflow in NTLM authentication in MailEnable Professional 2.0 and Enterprise 2.0 allows remote attackers to execute arbitrary code via "the signature field of NTLM Type 1 messages".

Published: 2006-10-10 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2006-5176 is rated High Risk (69.4/100): CVSS Critical severity, with high exploitation likelihood (EPSS 12.72%, 94th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

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

Exploit prediction scoring system (EPSS) score for CVE-2006-5176

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 2025-05-25 13.26% 12.72% -0.54%
2 2025-04-02 12.40% 13.26% +0.86%
3 2025-03-30 — 12.40% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2006-5176

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.3 2.0 HIGH
AV:N/AC:M/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:M)
Exploitation needs some favorable conditions, but not exceptional ones.
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.
 8.6 10.0 [email protected]

Weakness enumeration for CVE-2006-5176

OS Trackers for CVE-2006-5176

vendor priority summary link
alpine — CVE-2006-5176: no source package rows; 0 state rows across 0 repos (none); fixed 0, open 0. https://security.alpinelinux.org/vuln/CVE-2006-5176

NVD evaluator notes for CVE-2006-5176

Solution: Hotfixes are available on the vendor web site that address this and related vulnerabilities.

Affected software / configurations for CVE-2006-5176

Vendor Product Version Raw CPE
mailenable mailenable_enterprise 2.0 cpe:2.3:a:mailenable:mailenable_enterprise:2.0:*:*:*:*:*:*:*
mailenable mailenable_professional 2.0 cpe:2.3:a:mailenable:mailenable_professional:2.0:*:*:*:*:*:*:*

References for CVE-2006-5176

cvelogic Threat Intelligence