auth.c in LibVNCServer 0.7.1 allows remote attackers to bypass authentication via a request in which the client specifies an insecure security type such as "Type 1 - None", which is accepted even if it is not offered by the server, a different issue than CVE-2006-2369.
Conclusion & alert: CVE-2006-2450 is rated Moderate Risk (62.5/100): CVSS High severity, with medium exploitation likelihood (EPSS 4.28%). Core evidence: EPSS rose +1.06% over the last day, indicating growing attacker interest. 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 | 3.22% | 4.28% | +1.06% |
| 2 | 2025-08-07 | 2.49% | 3.22% | +0.73% |
| 3 | 2025-05-14 | — | 2.49% | — |
Full EPSS history (18 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.5 | 2.0 | HIGH |
|
10.0 | 6.4 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
high | CVE-2006-2450 high priority: Debian including 1 source packages (libvncserver), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. | https://security-tracker.debian.org/tracker/CVE-2006-2450 |
gentoo
|
high | CVE-2006-2450: 3 GLSA(s) (200608-05, 200608-12, 200703-19), 3 atom(s) (net-libs/libvncserver, net-misc/ltsp, x11-misc/x11vnc); latest impact high. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2006-2450 |
redhat
|
— | — | https://access.redhat.com/security/cve/CVE-2006-2450 |
suse
|
medium | CVE-2006-2450 severity moderate: SUSE including 10 source package names (LibVNCServer, LibVNCServer-0.9.1-154.24, …), 13 product×package rows across 8 product lines (SUSE Linux Enterprise Server 11 SP1, SUSE Linux Enterprise Server 11 SP2, … (8 product lines)): Fixed 10, Known Not Affected 3. | https://www.suse.com/security/cve/CVE-2006-2450/ |
ubuntu
|
high | CVE-2006-2450 high priority: Ubuntu including 1 source packages (libvncserver), 9 status rows across 9 suites (dapper, edgy, feisty, gutsy, hardy, intrepid, jaunty, karmic, upstream): not-affected 7, ignored 1, released 1. | https://ubuntu.com/security/CVE-2006-2450 |
Not vulnerable. This issue does not affect the versions of LibVNCServer as distributed with Red Hat Enterprise Linux 2.1, 3, or 4.
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| libvncserver | libvncserver | 0.7.1 | cpe:2.3:a:libvncserver:libvncserver:0.7.1:*:*:*:*:*:*:* |