CVE-2026-5404 — Denial of Service
CVE-2026-5404 — K12 RF5 file parser crash in Wireshark 4.6.0 to 4.6.4 and 4.4.0 to 4.4.14 allows denial of service
What This Means For You
- If your environment is affected by CWE-120, review your exposure and prioritize patching based on your environment. Monitor vendor advisories for CVE-2026-5404 updates and patches.
Related ATT&CK Techniques
🛡️ Detection Rules
2 rules · 6 SIEM formats2 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2026-5404 Wireshark K12 RF5 Parser DoS
title: CVE-2026-5404 Wireshark K12 RF5 Parser DoS
id: scw-2026-05-01-ai-1
status: experimental
level: medium
description: |
Detects the execution of Wireshark with a .k12 file, which is associated with the CVE-2026-5404 vulnerability. This vulnerability allows for a denial of service by crashing the K12 RF5 file parser. This rule aims to catch the initial trigger of the vulnerability.
author: SCW Feed Engine (AI-generated)
date: 2026-05-01
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-5404/
tags:
- attack.execution
- attack.t1204.002
logsource:
category: process_creation
detection:
selection:
Image|endswith:
- 'wireshark.exe'
CommandLine|contains:
- '.k12'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-5404 | vulnerability | CVE-2026-5404 |
| CWE-120 | weakness | CWE-120 |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 01, 2026 at 03:16 UTC |
This content was curated and summarized by Shimi's Cyber World for informational purposes. It is not copied or republished in full. All intellectual property rights remain with the original author and source.
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