CVE-2006-3840

The SMB Mailslot parsing functionality in PAM in multiple ISS products with XPU (24.39/1.78/epj/x.x.x.1780), including Proventia A, G, M, Server, and Desktop, BlackICE PC and Server Protection 3.6, and RealSecure 7.0, allows remote attackers to cause a denial of service (infinite loop) via a crafted SMB packet that is not properly handled by the SMB_Mailslot_Heap_Overflow decode.

Published: 2006-07-27 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2006-3840 is rated Moderate Risk (52.3/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 4.12%). EPSS rose +1.40% over the last day, indicating growing attacker interest. Review affected assets and schedule 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-2006-3840

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 2025-08-20 2.73% 4.12% +1.40%
2 2025-03-30 2.56% 2.73% +0.16%
3 2025-03-29 — 2.56% —

Full EPSS history (14 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2006-3840

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-2006-3840

Affected software / configurations for CVE-2006-3840

Vendor Product Version Raw CPE
iss blackice_pc_protection 3.6cpk cpe:2.3:a:iss:blackice_pc_protection:3.6cpk:*:*:*:*:*:*:*
iss blackice_server_protection 3.6cpk cpe:2.3:a:iss:blackice_server_protection:3.6cpk:*:*:*:*:*:*:*
iss proventia_desktop 8.0.675.1790 cpe:2.3:a:iss:proventia_desktop:8.0.675.1790:*:*:*:*:*:*:*
iss proventia_desktop 8.0.812.1790 cpe:2.3:a:iss:proventia_desktop:8.0.812.1790:*:*:*:*:*:*:*
iss realsecure_desktop 7.0epk cpe:2.3:a:iss:realsecure_desktop:7.0epk:*:*:*:*:*:*:*
iss realsecure_network 7.0 cpe:2.3:a:iss:realsecure_network:7.0:*:*:*:*:*:*:*
iss realsecure_server_sensor 7.0 cpe:2.3:a:iss:realsecure_server_sensor:7.0:*:*:*:*:*:*:*
iss proventia_a_series_xpu — cpe:2.3:h:iss:proventia_a_series_xpu:*:*:*:*:*:*:*:*
iss proventia_g_series_xpu — cpe:2.3:h:iss:proventia_g_series_xpu:*:*:*:*:*:*:*:*
iss proventia_m_series_xpu — cpe:2.3:h:iss:proventia_m_series_xpu:*:*:*:*:*:*:*:*
iss proventia_server 1.0.914.1880 cpe:2.3:h:iss:proventia_server:1.0.914.1880:*:*:*:*:*:*:*

References for CVE-2006-3840

cvelogic Threat Intelligence