sink.c in fetchmail before 6.3.9 allows context-dependent attackers to cause a denial of service (NULL dereference and application crash) by refusing certain warning messages that are sent over SMTP.
Conclusion & alert: CVE-2007-4565 is rated Moderate Risk (46.1/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.97%). 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 | 3.08% | 1.97% | -1.10% |
| 2 | 2026-04-16 | 2.96% | 3.08% | +0.12% |
| 3 | 2025-12-01 | — | 2.96% | — |
Full EPSS history (17 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 5.0 | 2.0 | MEDIUM |
|
10.0 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
low | CVE-2007-4565 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-2007-4565 |
redhat
|
low | — | https://access.redhat.com/security/cve/CVE-2007-4565 |
suse
|
medium | CVE-2007-4565 severity moderate: SUSE including 7 source package names (fetchmail-6.3.8.90-13.16.1, fetchmail-6.3.8.90-13.20.19.1, …), 11 product×package rows across 6 product lines (SUSE Linux Enterprise Server 11 SP1, SUSE Linux Enterprise Server 11 SP2, … (6 product lines)): Fixed 11. | https://www.suse.com/security/cve/CVE-2007-4565/ |
ubuntu
|
medium | CVE-2007-4565 medium priority: Ubuntu including 1 source packages (fetchmail), 4 status rows across 4 suites (dapper, edgy, feisty, upstream): released 4. | https://ubuntu.com/security/CVE-2007-4565 |
This issue was addressed in fetchmail packages as shipped in Red Hat Enterprise Linux 3, 4, and 5 via: https://rhn.redhat.com/errata/RHSA-2009-1427.html
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| fetchmail | fetchmail | <= 6.3.9 | cpe:2.3:a:fetchmail:fetchmail:*:rc2:*:*:*:*:*:* |
| fetchmail | fetchmail | 4.5.1 | cpe:2.3:a:fetchmail:fetchmail:4.5.1:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 4.5.2 | cpe:2.3:a:fetchmail:fetchmail:4.5.2:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 4.5.3 | cpe:2.3:a:fetchmail:fetchmail:4.5.3:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 4.5.4 | cpe:2.3:a:fetchmail:fetchmail:4.5.4:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 4.5.5 | cpe:2.3:a:fetchmail:fetchmail:4.5.5:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 4.5.6 | cpe:2.3:a:fetchmail:fetchmail:4.5.6:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 4.5.7 | cpe:2.3:a:fetchmail:fetchmail:4.5.7:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 4.5.8 | cpe:2.3:a:fetchmail:fetchmail:4.5.8:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 4.6.0 | cpe:2.3:a:fetchmail:fetchmail:4.6.0:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 4.6.1 | cpe:2.3:a:fetchmail:fetchmail:4.6.1:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 4.6.2 | cpe:2.3:a:fetchmail:fetchmail:4.6.2:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 4.6.3 | cpe:2.3:a:fetchmail:fetchmail:4.6.3:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 4.6.4 | cpe:2.3:a:fetchmail:fetchmail:4.6.4:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 4.6.5 | cpe:2.3:a:fetchmail:fetchmail:4.6.5:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 4.6.6 | cpe:2.3:a:fetchmail:fetchmail:4.6.6:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 4.6.7 | cpe:2.3:a:fetchmail:fetchmail:4.6.7:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 4.6.8 | cpe:2.3:a:fetchmail:fetchmail:4.6.8:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 4.6.9 | cpe:2.3:a:fetchmail:fetchmail:4.6.9:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 4.7.0 | cpe:2.3:a:fetchmail:fetchmail:4.7.0:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 4.7.1 | cpe:2.3:a:fetchmail:fetchmail:4.7.1:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 4.7.2 | cpe:2.3:a:fetchmail:fetchmail:4.7.2:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 4.7.3 | cpe:2.3:a:fetchmail:fetchmail:4.7.3:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 4.7.4 | cpe:2.3:a:fetchmail:fetchmail:4.7.4:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 4.7.5 | cpe:2.3:a:fetchmail:fetchmail:4.7.5:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 4.7.6 | cpe:2.3:a:fetchmail:fetchmail:4.7.6:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 4.7.7 | cpe:2.3:a:fetchmail:fetchmail:4.7.7:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.0.0 | cpe:2.3:a:fetchmail:fetchmail:5.0.0:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.0.1 | cpe:2.3:a:fetchmail:fetchmail:5.0.1:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.0.2 | cpe:2.3:a:fetchmail:fetchmail:5.0.2:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.0.3 | cpe:2.3:a:fetchmail:fetchmail:5.0.3:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.0.4 | cpe:2.3:a:fetchmail:fetchmail:5.0.4:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.0.5 | cpe:2.3:a:fetchmail:fetchmail:5.0.5:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.0.6 | cpe:2.3:a:fetchmail:fetchmail:5.0.6:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.0.7 | cpe:2.3:a:fetchmail:fetchmail:5.0.7:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.0.8 | cpe:2.3:a:fetchmail:fetchmail:5.0.8:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.1.0 | cpe:2.3:a:fetchmail:fetchmail:5.1.0:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.1.4 | cpe:2.3:a:fetchmail:fetchmail:5.1.4:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.2.0 | cpe:2.3:a:fetchmail:fetchmail:5.2.0:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.2.1 | cpe:2.3:a:fetchmail:fetchmail:5.2.1:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.2.3 | cpe:2.3:a:fetchmail:fetchmail:5.2.3:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.2.4 | cpe:2.3:a:fetchmail:fetchmail:5.2.4:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.2.7 | cpe:2.3:a:fetchmail:fetchmail:5.2.7:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.2.8 | cpe:2.3:a:fetchmail:fetchmail:5.2.8:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.3.0 | cpe:2.3:a:fetchmail:fetchmail:5.3.0:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.3.1 | cpe:2.3:a:fetchmail:fetchmail:5.3.1:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.3.3 | cpe:2.3:a:fetchmail:fetchmail:5.3.3:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.3.8 | cpe:2.3:a:fetchmail:fetchmail:5.3.8:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.4.0 | cpe:2.3:a:fetchmail:fetchmail:5.4.0:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.4.3 | cpe:2.3:a:fetchmail:fetchmail:5.4.3:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.4.4 | cpe:2.3:a:fetchmail:fetchmail:5.4.4:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.4.5 | cpe:2.3:a:fetchmail:fetchmail:5.4.5:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.5.0 | cpe:2.3:a:fetchmail:fetchmail:5.5.0:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.5.2 | cpe:2.3:a:fetchmail:fetchmail:5.5.2:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.5.3 | cpe:2.3:a:fetchmail:fetchmail:5.5.3:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.5.5 | cpe:2.3:a:fetchmail:fetchmail:5.5.5:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.5.6 | cpe:2.3:a:fetchmail:fetchmail:5.5.6:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.6.0 | cpe:2.3:a:fetchmail:fetchmail:5.6.0:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.7.0 | cpe:2.3:a:fetchmail:fetchmail:5.7.0:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.7.2 | cpe:2.3:a:fetchmail:fetchmail:5.7.2:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.7.4 | cpe:2.3:a:fetchmail:fetchmail:5.7.4:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.8 | cpe:2.3:a:fetchmail:fetchmail:5.8:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.8.1 | cpe:2.3:a:fetchmail:fetchmail:5.8.1:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.8.2 | cpe:2.3:a:fetchmail:fetchmail:5.8.2:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.8.3 | cpe:2.3:a:fetchmail:fetchmail:5.8.3:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.8.4 | cpe:2.3:a:fetchmail:fetchmail:5.8.4:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.8.5 | cpe:2.3:a:fetchmail:fetchmail:5.8.5:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.8.6 | cpe:2.3:a:fetchmail:fetchmail:5.8.6:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.8.11 | cpe:2.3:a:fetchmail:fetchmail:5.8.11:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.8.13 | cpe:2.3:a:fetchmail:fetchmail:5.8.13:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.8.14 | cpe:2.3:a:fetchmail:fetchmail:5.8.14:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.8.17 | cpe:2.3:a:fetchmail:fetchmail:5.8.17:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.9.0 | cpe:2.3:a:fetchmail:fetchmail:5.9.0:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.9.4 | cpe:2.3:a:fetchmail:fetchmail:5.9.4:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.9.5 | cpe:2.3:a:fetchmail:fetchmail:5.9.5:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.9.8 | cpe:2.3:a:fetchmail:fetchmail:5.9.8:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.9.10 | cpe:2.3:a:fetchmail:fetchmail:5.9.10:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.9.11 | cpe:2.3:a:fetchmail:fetchmail:5.9.11:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 5.9.13 | cpe:2.3:a:fetchmail:fetchmail:5.9.13:*:*:*:*:*:*:* |
| fetchmail | fetchmail | 6.0.0 | cpe:2.3:a:fetchmail:fetchmail:6.0.0:*:*:*:*:*:*:* |