CVE-2026-76920 Out-of-bounds Write in Wireshark

Medium 4.7 Published 19 Aug 2026 Updated 20 Aug 2026

An out-of-bounds write in the 3GPP phone log 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-2026-76920?

CVE-2026-76920 is a medium-severity memory corruption vulnerability in Wireshark Wireshark, published on 19 Aug 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

3gpp phone log file parser crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service

Weakness: CWE-787

Which versions are affected by CVE-2026-76920?

It affects 1 product.

Products include Wireshark Wireshark.

How do I fix CVE-2026-76920?

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-2026-76920 being exploited?

There is no known exploitation of CVE-2026-76920 in the wild and no public exploit code.

All Wireshark Wireshark vulnerabilities

Sources

Also known as AZL-96812, DEBIAN-CVE-2026-76920, GHSA-wpxj-7r5r-vw5w, MINI-hcp9-238r-rjhh, UBUNTU-CVE-2026-76920.