CVE-2004-0309

Stack-based buffer overflow in the SMTP service support in vsmon.exe in Zone Labs ZoneAlarm before 4.5.538.001, ZoneLabs Integrity client 4.0 before 4.0.146.046, and 4.5 before 4.5.085, allows remote attackers to execute arbitrary code via a long RCPT TO argument.

Published: 2004-11-23 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2004-0309 is rated High Risk (78.7/100): CVSS Critical severity, with high exploitation likelihood (EPSS 31.50%, 97th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +4.81% over the last day, indicating growing attacker interest. 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-2004-0309

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 2026-05-07 26.69% 31.50% +4.81%
2 2025-03-30 28.33% 26.69% -1.64%
3 2025-03-29 — 28.33% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2004-0309

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-2004-0309

Affected software / configurations for CVE-2004-0309

Vendor Product Version Raw CPE
zonelabs integrity 4.0 cpe:2.3:a:zonelabs:integrity:4.0:*:*:*:*:*:*:*
zonelabs zonealarm 4.0 cpe:2.3:a:zonelabs:zonealarm:4.0:*:*:*:*:*:*:*
zonelabs zonealarm 4.0 cpe:2.3:a:zonelabs:zonealarm:4.0:*:plus:*:*:*:*:*
zonelabs zonealarm 4.0 cpe:2.3:a:zonelabs:zonealarm:4.0:*:pro:*:*:*:*:*
zonelabs zonealarm 4.5 cpe:2.3:a:zonelabs:zonealarm:4.5:*:pro:*:*:*:*:*

References for CVE-2004-0309

cvelogic Threat Intelligence