Vixie Cron before 4.1-r10 on Gentoo Linux is installed with insecure permissions, which allows local users to cause a denial of service (cron failure) by creating hard links, which results in a failed st_nlink check in database.c.
Conclusion & alert: CVE-2007-1856 is rated Low Risk (7.8/100): CVSS Low severity, with low exploitation likelihood (EPSS 0.05%). Mandatory action: 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.
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 | 2025-03-17 | 10.59% | 0.05% | -10.54% |
| 2 | 2024-09-10 | 5.81% | 10.59% | +4.78% |
| 3 | 2024-06-13 | — | 5.81% | — |
Full EPSS history (5 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 2.1 | 2.0 | LOW |
|
3.9 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
unimportant | CVE-2007-1856 unimportant priority: Debian including 1 source packages (cron), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2007-1856 |
gentoo
|
low | CVE-2007-1856: 1 GLSA(s) (200704-11), 1 atom(s) (sys-process/vixie-cron); latest impact low. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2007-1856 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2007-1856 |
ubuntu
|
medium | CVE-2007-1856 medium priority: Ubuntu including 1 source packages (cron), 4 status rows across 4 suites (dapper, edgy, feisty, upstream): not-affected 3, needs-triage 1. | https://ubuntu.com/security/CVE-2007-1856 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| paul_vixie | vixie_cron | <= 4.1 | cpe:2.3:a:paul_vixie:vixie_cron:*:*:*:*:*:*:*:* |