CVE-2026-5434 — Honeywell Control Network Module (CNM) contains insertion

title: CVE-2026-5434 - Honeywell CNM Sensitive Information Insertion Attempt
id: scw-2026-05-21-ai-1
status: experimental
level: high
description: |
  Detects attempts to write sensitive system files on Honeywell Control Network Module (CNM) systems, which is indicative of an attempt to exploit CVE-2026-5434 by inserting sensitive information into unintended directories. This could lead to unauthorized access to protected data.
author: SCW Feed Engine (AI-generated)
date: 2026-05-21
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-5434/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: file_event
detection:
  selection:
      TargetFilename|contains:
          - '/etc/passwd'
          - '/etc/shadow'
          - '/etc/hosts'
          - '/var/log/syslog'
          - '/var/log/auth.log'
      action:
          - 'write'
      condition: selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse