Multiple stack-based buffer overflows in the File Transfer feature in rfbserver.c in LibVNCServer 0.9.9 and earlier allow remote authenticated users to cause a denial of service (crash) and possibly execute arbitrary code via a (1) long file or (2) directory name or the (3) FileTime attribute in a rfbFileTransferOffer message.
Conclusion & alert: CVE-2014-6055 is rated Moderate Risk (55.5/100): CVSS Medium severity, with high exploitation likelihood (EPSS 7.83%, 94th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. 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 | 2026-06-15 | 11.16% | 7.83% | -3.33% |
| 2 | 2025-03-30 | 18.21% | 11.16% | -7.06% |
| 3 | 2025-03-29 | — | 18.21% | — |
Full EPSS history (10 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 6.5 | 2.0 | MEDIUM |
|
8.0 | 6.4 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
debian
|
not yet assigned | CVE-2014-6055 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-2014-6055 |
gentoo
|
normal | CVE-2014-6055: 1 GLSA(s) (201507-07), 1 atom(s) (net-libs/libvncserver); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2014-6055 |
redhat
|
medium | — | https://access.redhat.com/security/cve/CVE-2014-6055 |
ubuntu
|
medium | CVE-2014-6055 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-2014-6055 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| fedoraproject | fedora | 20 | cpe:2.3:o:fedoraproject:fedora:20:*:*:*:*:*:*:* |
| fedoraproject | fedora | 21 | cpe:2.3:o:fedoraproject:fedora:21:*:*:*:*:*:*:* |
| debian | debian_linux | 7.0 | cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_aus | 6.5 | cpe:2.3:o:redhat:enterprise_linux_server_aus:6.5:*:*:*:*:*:*:* |
| redhat | enterprise_linux_server_eus | 6.5.z | cpe:2.3:o:redhat:enterprise_linux_server_eus:6.5.z:*:*:*:*:*:*:* |
| libvncserver | libvncserver | <= 0.9.9 | cpe:2.3:a:libvncserver:libvncserver:*:*:*:*:*:*:*:* |