CVE-2004-0423

The log_event function in ssmtp 2.50.6 and earlier allows local users to overwrite arbitrary files via a symlink attack on the ssmtp.log temporary log file.

Published: 2004-07-07 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2004-0423 is rated Low Risk (16/100): CVSS Low severity, with low exploitation likelihood (EPSS 0.30%). Low composite risk—no urgent action required; patch on your normal maintenance cycle and revisit priority if CVSS or EPSS increases.

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-2004-0423

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 2026-06-15 0.24% 0.30% +0.06%
2 2026-06-11 0.08% 0.24% +0.16%
3 2025-03-17 — 0.08% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2004-0423

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
2.1 2.0 LOW
AV:L/AC:L/Au:N/C:N/I:P/A:N Click to expand
Access vector (AV:L)
Requires local access to the target system.
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:P)
Partial integrity impact.
Availability impact (A:N)
No availability impact.
 3.9 2.9 [email protected]

Weakness enumeration for CVE-2004-0423

OS Trackers for CVE-2004-0423

vendor priority summary link
debian unimportant CVE-2004-0423 unimportant priority: Debian including 1 source packages (ssmtp), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 5. https://security-tracker.debian.org/tracker/CVE-2004-0423

Affected software / configurations for CVE-2004-0423

Vendor Product Version Raw CPE
ssmtp ssmtp <= 2.50.6 cpe:2.3:a:ssmtp:ssmtp:*:*:*:*:*:*:*:*

References for CVE-2004-0423

cvelogic Threat Intelligence