CVE-2026-96420 Buffer Over-read in Wireshark

Medium 4.7 Published 29 Sep 2026 Updated 29 Sep 2026

A buffer over-read in the Toshiba file parser allows attackers to cause a denial of service via crafted files.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2026-96420?

CVE-2026-96420 is a medium-severity memory corruption vulnerability in Wireshark Wireshark, published on 29 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

Toshiba file parser crash in 4.6.0 to 4.6.8 and 4.4.0 to 4.4.18 allows denial of service

Weakness: CWE-126

Which versions are affected by CVE-2026-96420?

It affects 1 product.

Products include Wireshark Wireshark.

How do I fix CVE-2026-96420?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-96420 being exploited?

There is no known exploitation of CVE-2026-96420 in the wild and no public exploit code.

All Wireshark Wireshark vulnerabilities

Sources

Also known as AZL-105000, DEBIAN-CVE-2026-96420, GHSA-f4wv-m8pm-cj63, MINI-pp25-wvmg-546w, UBUNTU-CVE-2026-96420.