What is CVE-2017-7394?

CVE-2017-7394 is a high-severity vulnerability in Tigervnc, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2017-04-01.

How severe is CVE-2017-7394?

High severity. CVSS v3 base score is 7.5 out of 10.

Improper input validation in Tigervnc

CVE-2017-7394

In TigerVNC 1.7.1 (SSecurityPlain.cxx SSecurityPlain::processMsg), unauthenticated users can crash the server by sending long usernames.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2017-04-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.016 (75.0th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 75.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: 0.000

Affected products

Tigervnc — versions 1.7.1

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

access.redhat.com/errata/RHSA-2017:2000 (vendor-advisory)
github.com/TigerVNC/tigervnc/pull/440 (Patch, Third Party Advisory, Issue Tracking)
www.securityfocus.com/bid/97305 (vdb-entry)
security.gentoo.org/glsa/201801-13 (vendor-advisory)

Frequently asked questions

What is CVE-2017-7394?: CVE-2017-7394 is a high-severity vulnerability in Tigervnc, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2017-04-01.
How severe is CVE-2017-7394?: High severity. CVSS v3 base score is 7.5 out of 10.