---
id: CVE-2026-76883
title: Heap-based Buffer Overflow in Wireshark
summary: >-
  Catapult DCT2000 file parser crash in 4.6.0 to 4.6.7 and 4.4.0 to 4.4.18
  allows denial of service
severity: medium
cvss: 4.7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-122
vendor: Wireshark Foundation
product: Wireshark
affected:
  - Wireshark >= 4.6.0 < 4.6.8
  - Wireshark >= 4.4.0 < 4.4.18
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-08-20T14:15:11.039192Z'
exploitAvailable: true
published: '2026-08-19'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T18:45:28.901Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-76883'
references:
  - url: 'https://www.wireshark.org/security/wnpa-sec-2026-74.html'
  - url: 'https://gitlab.com/wireshark/wireshark/-/work_items/21427'
tags:
  - cve.org
  - exploit-available
epss: 0.00136
epssPercentile: 0.02435
ingestedAt: '2026-09-17T19:26:25.343Z'
---

## Overview

Catapult DCT2000 file parser 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