CVE-2026-43901 — Wireshark MCP is an MCP Server that turns tshark into a

title: CVE-2026-43901 - Wireshark MCP Arbitrary File Write via tshark --export-objects
id: scw-2026-05-11-ai-1
status: experimental
level: high
description: |
  This rule detects the exploitation of CVE-2026-43901. The vulnerability allows an attacker to control the `dest_dir` parameter passed to tshark's `--export-objects` flag. In default configurations, this bypasses path restrictions, enabling arbitrary file writes to the filesystem. This detection specifically looks for the `tshark.exe` process being invoked with the `--export-objects` flag and a `dest_dir` argument, indicating a potential attempt to exploit this path traversal vulnerability.
author: SCW Feed Engine (AI-generated)
date: 2026-05-11
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-43901/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: process_creation
detection:
  selection:
      Image|endswith:
          - 'tshark.exe'
      CommandLine|contains:
          - '--export-objects'
      CommandLine|contains:
          - 'dest_dir='
  condition: selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse