The rfbProcessClientNormalMessage function in libvncserver/rfbserver.c in LibVNCServer 0.9.9 and earlier allows remote attackers to cause a denial of service (divide-by-zero error and server crash) via a zero value in the scaling factor in a (1) PalmVNCSetScaleFactor or (2) SetScale message.
Conclusion & alert: CVE-2014-6054 is rated Moderate Risk (54.4/100): CVSS Medium severity, with high exploitation likelihood (EPSS 37.75%, 97th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +3.17% over the last day, indicating growing attacker interest. 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 | 2026-05-13 | 34.58% | 37.75% | +3.17% |
| 2 | 2026-01-02 | 40.56% | 34.58% | -5.99% |
| 3 | 2025-12-28 | — | 40.56% | — |
Full EPSS history (16 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 4.3 | 2.0 | MEDIUM |
|
8.6 | 2.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2014-6054 not yet assigned 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-2014-6054 |
gentoo
|
normal | CVE-2014-6054: 1 GLSA(s) (201507-07), 1 atom(s) (net-libs/libvncserver); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2014-6054 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2014-6054 |
ubuntu
|
medium | CVE-2014-6054 medium priority: Ubuntu including 3 source packages (italc, krfb, libvncserver), 13 status rows across 7 suites (bionic, focal, lucid, precise, trusty, upstream, xenial): released 5, DNE 4, needs-triage 2, ignored 1, not-affected 1. | https://ubuntu.com/security/CVE-2014-6054 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| libvncserver | libvncserver | <= 0.9.9 | cpe:2.3:a:libvncserver:libvncserver:*:*:*:*:*:*:*:* |
| debian | debian_linux | 7.0 | cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* |
| canonical | ubuntu_linux | 12.04 | cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:* |
| canonical | ubuntu_linux | 14.04 | cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:* |
| URL | Tags |
|---|---|
| http://lists.opensuse.org/opensuse-updates/2015-12/msg00022.html | |
| http://seclists.org/oss-sec/2014/q3/639 | Mailing List Third Party Advisory |
| http://secunia.com/advisories/61506 | |
| http://secunia.com/advisories/61682 | |
| http://www.debian.org/security/2014/dsa-3081 | Third Party Advisory |
| http://www.ocert.org/advisories/ocert-2014-007.html | Third Party Advisory US Government Resource |
| http://www.openwall.com/lists/oss-security/2014/09/25/11 | Mailing List Third Party Advisory |
| http://www.securityfocus.com/bid/70094 | |
| http://www.ubuntu.com/usn/USN-2365-1 | Third Party Advisory |
| https://github.com/newsoft/libvncserver/commit/05a9bd41a8ec0a9d580a8f420f41718bdd235446 | Issue Tracking Patch |
| https://lists.debian.org/debian-lts-announce/2019/10/msg00042.html | |
| https://security.gentoo.org/glsa/201507-07 | |
| https://usn.ubuntu.com/4587-1/ |