---
id: CVE-2026-76879
title: Stack-based Buffer Overflow in Wireshark
summary: >-
  C12.22 protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows
  denial of service
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-121
vendor: Wireshark Foundation
product: Wireshark
affected:
  - Wireshark >= 4.6.0 < 4.6.8
  - Wireshark >= 4.4.0 < 4.4.18
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-08-20T15:08:32.060760Z'
published: '2026-08-19'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T18:44:57.877Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-76879'
references:
  - url: 'https://www.wireshark.org/security/wnpa-sec-2026-89.html'
  - url: 'https://gitlab.com/wireshark/wireshark/-/work_items/21480'
tags:
  - cve.org
epss: 0.00269
epssPercentile: 0.19301
ingestedAt: '2026-09-17T19:26:25.344Z'
---

## Overview

C12.22 protocol dissector crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18 allows denial of service

## Affected

- `Wireshark >= 4.6.0 < 4.6.8`
- `Wireshark >= 4.4.0 < 4.4.18`

## Remediation

Upgrade to version 4.6.8 or above