fetchmail before 6.3.1 and before 6.2.5.5, when configured for multidrop mode, allows remote attackers to cause a denial of service (application crash) by sending messages without headers from upstream mail servers.
Conclusion & alert: CVE-2005-4348 is rated Moderate Risk (57/100): CVSS High severity, with medium exploitation likelihood (EPSS 3.64%). Mandatory action: Review affected assets and schedule remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
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 | 9.99% | 3.64% | -6.35% |
| 2 | 2025-03-30 | 8.47% | 9.99% | +1.52% |
| 3 | 2025-03-29 | — | 8.47% | — |
Full EPSS history (12 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.8 | 2.0 | HIGH |
|
10.0 | 6.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
low | CVE-2005-4348 low priority: Debian including 1 source packages (fetchmail), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2005-4348 |
redhat
|
low | — | https://access.redhat.com/security/cve/CVE-2005-4348 |
suse
|
medium | — | https://www.suse.com/security/cve/CVE-2005-4348/ |
ubuntu
|
medium | CVE-2005-4348 medium priority: Ubuntu including 1 source packages (fetchmail), 4 status rows across 4 suites (dapper, edgy, feisty, upstream): released 3, needs-triage 1. | https://ubuntu.com/security/CVE-2005-4348 |
The Red Hat Security Response Team has rated this issue as having low security impact. An update is available for Red Hat Enterprise Linux 4 to correct this issue: http://rhn.redhat.com/errata/RHSA-2007-0018.html This issue did not affect Red Hat Enterprise Linux 2.1 and 3.