CVE-2026-41511 — OpenMcdf is a fully .NET / C# library to manipulate

title: Potential OpenMcdf Infinite Loop Exploit Attempt - CVE-2026-41511
id: scw-2026-05-08-ai-1
status: experimental
level: medium
description: |
  Detects processes associated with the .NET runtime attempting to execute methods known to be vulnerable to an infinite loop in OpenMcdf (CVE-2026-41511). This indicates a potential attempt to exploit the vulnerability by processing a crafted CFB file that causes indefinite looping.
author: SCW Feed Engine (AI-generated)
date: 2026-05-08
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-41511/
tags:
  - attack.execution
  - attack.t1204.002
logsource:
    category: process_creation
detection:
  selection:
      Image|contains:
          - '.NET Runtime'
      CommandLine|contains:
          - 'Storage.EnumerateEntries()'
          - 'Storage.OpenStream()'
      condition: selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse