The ProcGetReservedColormapEntries function in the TOG-CUP extension in X.Org Xserver before 1.4.1 allows context-dependent attackers to read the contents of arbitrary memory locations via a request containing a 32-bit value that is improperly used as an array index.
Conclusion & alert: CVE-2007-6428 is rated Moderate Risk (45.3/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.74%). 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 | 2.51% | 1.74% | -0.78% |
| 2 | 2026-05-26 | 3.35% | 2.51% | -0.84% |
| 3 | 2026-02-12 | — | 3.35% | — |
Full EPSS history (15 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
|
not yet assigned | CVE-2007-6428 not yet assigned priority: Debian including 1 source packages (xorg-server), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2007-6428 |
gentoo
|
high | CVE-2007-6428: 1 GLSA(s) (200801-09), 2 atom(s) (x11-base/xorg-server, x11-libs/libXfont); latest impact high. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2007-6428 |
redhat
|
low | — | https://access.redhat.com/security/cve/CVE-2007-6428 |
ubuntu
|
medium | CVE-2007-6428 medium priority: Ubuntu including 1 source packages (xorg-server), 5 status rows across 5 suites (dapper, edgy, feisty, gutsy, upstream): released 4, pending 1. | https://ubuntu.com/security/CVE-2007-6428 |