What is CVE-2016-4420?

CVE-2016-4420 is a medium-severity vulnerability in Wireshark, classified under Improper Input Validation. CVSS score: 5.9/10. Published 2016-05-01.

How severe is CVE-2016-4420?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Improper input validation in Wireshark

CVE-2016-4420

The NFS dissector in Wireshark 2.x before 2.0.2 allows remote attackers to cause a denial of service (application crash) via a crafted packet.

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

Published 2016-05-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.014 (71.2th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 71.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000

Affected products

Wireshark — versions 2.0.0, 2.0.1

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

www.wireshark.org/security/wnpa-sec-2016-17.html (Vendor Advisory)

Frequently asked questions

What is CVE-2016-4420?: CVE-2016-4420 is a medium-severity vulnerability in Wireshark, classified under Improper Input Validation. CVSS score: 5.9/10. Published 2016-05-01.
How severe is CVE-2016-4420?: Medium severity. CVSS v3 base score is 5.9 out of 10.