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How CVE-2025-6218 Works
The vulnerability in WinRAR (CVE-2025-6218) stems from improper handling of file paths within archive files. Attackers craft malicious RAR archives containing directory traversal sequences (e.g., ../) in filenames. When a user extracts the archive, WinRAR fails to properly sanitize these paths, allowing files to be written outside the intended directory. This can lead to remote code execution (RCE) if a malicious executable is placed in a startup or system directory. Exploitation requires user interaction—opening a malicious file or visiting a malicious webpage that delivers the archive.
DailyCVE Form
Platform: WinRAR
Version: Pre-7.0
Vulnerability: Directory Traversal → RCE
Severity: Critical
Date: 06/25/2025
Prediction: Patch by 08/2025
What Undercode Say
Analytics:
Check WinRAR version: winrar /? | find "Version" Monitor extracted files: Procmon.exe -filter "Path contains ..\"
How Exploit:
- Craft RAR with `../malware.exe` paths.
- Social engineering to trigger extraction.
Protection from this CVE:
- Update to WinRAR 7.0+.
- Disable archive preview.
Impact:
- Full system compromise via RCE.
- Malware persistence.
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
