CVE-2025-15351
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary code by tricking users into opening malicious CHX files or visiting malicious pages. It affects Anritsu VectorStar installations due to improper deserialization of untrusted data during CHX file parsing. Attackers can exploit this to run code with the privileges of the current process.
💻 Affected Systems
- Anritsu VectorStar
📦 What is this software?
Vectorstar by Anritsu
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise leading to data theft, lateral movement, or persistent backdoor installation.
Likely Case
Local privilege escalation or malware execution on the affected VectorStar system.
If Mitigated
Limited impact if file execution is blocked or user interaction is prevented.
🎯 Exploit Status
Exploitation requires social engineering to deliver malicious CHX file or link.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific patched version.
Vendor Advisory: https://www.anritsu.com/en-us/support/security-advisories
Restart Required: Yes
Instructions:
1. Check Anritsu security advisory for patch details. 2. Download and apply the official patch from Anritsu. 3. Restart the VectorStar application or system as required.
🔧 Temporary Workarounds
Block CHX file execution
windowsPrevent execution of CHX files via application control or file restrictions.
Use Windows AppLocker or similar to block .chx files.
User awareness training
allEducate users to avoid opening untrusted CHX files or clicking suspicious links.
🧯 If You Can't Patch
- Isolate VectorStar systems from untrusted networks and internet access.
- Implement strict file integrity monitoring and application whitelisting.
🔍 How to Verify
Check if Vulnerable:
Check VectorStar version against patched version in vendor advisory.Check Version:
Check VectorStar 'About' menu or consult system documentation.Verify Fix Applied:
Verify VectorStar version matches or exceeds patched version from advisory.📡 Detection & Monitoring
Log Indicators:
- Unexpected process execution from VectorStar
- CHX file access from untrusted sources
Network Indicators:
- Outbound connections from VectorStar to unknown IPs post-file open
SIEM Query:
Process creation where parent process is VectorStar and command line includes .chx file from untrusted location.