CVE-2025-11001
📋 TL;DR
This vulnerability in 7-Zip allows remote attackers to execute arbitrary code by exploiting directory traversal through specially crafted ZIP files containing symbolic links. Attackers can leverage this to run code with the privileges of the service account processing the ZIP file. All users of affected 7-Zip versions are vulnerable when processing untrusted ZIP archives.
💻 Affected Systems
- 7-Zip
📦 What is this software?
7 Zip by 7 Zip
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise with remote code execution as the service account, potentially leading to data theft, ransomware deployment, or complete system takeover.
Likely Case
Local privilege escalation or arbitrary file write/read through directory traversal, enabling further exploitation or data exfiltration.
If Mitigated
Limited impact with proper sandboxing and least privilege configurations, potentially only file system access within restricted directories.
🎯 Exploit Status
Exploitation requires user interaction to open a malicious ZIP file, but no authentication is needed. The vulnerability is in the core ZIP parsing logic.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 24.08 and later
Vendor Advisory: https://www.7-zip.org/history.txt
Restart Required: No
Instructions:
1. Download latest 7-Zip version from official website. 2. Uninstall current version. 3. Install new version. 4. Verify installation with version check.
🔧 Temporary Workarounds
Disable ZIP processing
allRemove or disable 7-Zip's association with ZIP files to prevent automatic processing
Windows: Control Panel > Default Programs > Associate file type > Remove .zip from 7-Zip
Linux: update-alternatives --config x-archive-manager
Use alternative archive tools
allTemporarily use other archive software that is not vulnerable
🧯 If You Can't Patch
- Implement application whitelisting to block 7-Zip execution
- Deploy endpoint protection with behavior monitoring for suspicious file operations
🔍 How to Verify
Check if Vulnerable:
Check 7-Zip version: 7z.exe --version (Windows) or 7z --version (Linux/macOS). If version is below 24.08, system is vulnerable.Check Version:
7z --versionVerify Fix Applied:
After updating, run version check command and confirm version is 24.08 or higher.📡 Detection & Monitoring
Log Indicators:
- Unusual process creation from 7-Zip
- File operations outside expected directories
- Multiple failed attempts to access system files
Network Indicators:
- Downloads of ZIP files from untrusted sources
- Outbound connections from 7-Zip process
SIEM Query:
ProcessName="7z*" AND (CommandLine CONTAINS ".." OR FilePath CONTAINS "..")