Balabit syslog-ng 2.0.x before 2.0.6 and 2.1.x before 2.1.8 allows remote attackers to cause a denial of service (crash) via a message with a timestamp that does not contain a trailing space, which triggers a NULL pointer dereference.
Conclusion & alert: CVE-2007-6437 is rated Moderate Risk (51.6/100): CVSS Medium severity, with high exploitation likelihood (EPSS 5.79%, 90th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. Mandatory action: 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.
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 | 2026-03-05 | 5.86% | 5.79% | -0.07% |
| 2 | 2026-01-13 | 5.18% | 5.86% | +0.68% |
| 3 | 2025-03-30 | — | 5.18% | — |
Full EPSS history (14 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-2007-6437 low priority: Debian including 1 source packages (syslog-ng), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2007-6437 |
gentoo
|
normal | CVE-2007-6437: 1 GLSA(s) (200712-19), 1 atom(s) (app-admin/syslog-ng); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2007-6437 |
redhat
|
low | — | https://access.redhat.com/security/cve/CVE-2007-6437 |
ubuntu
|
medium | CVE-2007-6437 medium priority: Ubuntu including 1 source packages (syslog-ng), 9 status rows across 9 suites (dapper, edgy, feisty, gutsy, hardy, intrepid, jaunty, karmic, upstream): released 8, ignored 1. | https://ubuntu.com/security/CVE-2007-6437 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| balabit | syslog-ng_open_source_edition | <= 2.0.6 | cpe:2.3:a:balabit:syslog-ng_open_source_edition:*:*:*:*:*:*:*:* |
| balabit | syslog-ng_premium_edition | <= 2.1.8 | cpe:2.3:a:balabit:syslog-ng_premium_edition:*:*:*:*:*:*:*:* |