The HandleRFBServerMessage function in libvncclient/rfbproto.c in LibVNCServer 0.9.9 and earlier does not check certain malloc return values, which allows remote VNC servers to cause a denial of service (application crash) or possibly execute arbitrary code by specifying a large screen size in a (1) FramebufferUpdate, (2) ResizeFrameBuffer, or (3) PalmVNCReSizeFrameBuffer message.
Conclusion & alert: CVE-2014-6052 is rated High Exploit Risk (79.8/100): CVSS High severity, with high exploitation likelihood (EPSS 6.75%, 93th percentile). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +2.21% over the last day, indicating growing attacker interest. Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
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 | 4.54% | 6.75% | +2.21% |
| 2 | 2026-05-13 | 5.24% | 4.54% | -0.70% |
| 3 | 2025-12-28 | — | 5.24% | — |
Full EPSS history (19 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
|
not yet assigned | CVE-2014-6052 not yet assigned priority: Debian including 2 source packages (libvncserver, veyon), 10 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 10. | https://security-tracker.debian.org/tracker/CVE-2014-6052 |
gentoo
|
normal | CVE-2014-6052: 1 GLSA(s) (201507-07), 1 atom(s) (net-libs/libvncserver); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2014-6052 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2014-6052 |
ubuntu
|
medium | CVE-2014-6052 medium priority: Ubuntu including 3 source packages (italc, krfb, libvncserver), 13 status rows across 7 suites (bionic, focal, lucid, precise, trusty, upstream, xenial): DNE 5, released 4, needs-triage 2, ignored 1, not-affected 1. | https://ubuntu.com/security/CVE-2014-6052 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| libvncserver | libvncserver | <= 0.9.9 | cpe:2.3:a:libvncserver:libvncserver:*:*:*:*:*:*:*:* |
| oracle | solaris | 11.3 | cpe:2.3:o:oracle:solaris:11.3:*:*:*:*:*:*:* |
| 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:*:*:* |