CVE-2025-55585
📋 TL;DR
This CVE describes an eval injection vulnerability in TOTOLINK A3002R routers that allows attackers to execute arbitrary code by manipulating input to the eval() function. This affects users running the vulnerable firmware version on these specific router models. Successful exploitation could lead to complete device compromise.
💻 Affected Systems
- TOTOLINK A3002R
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to full router compromise, credential theft, network traffic interception, and lateral movement into connected networks.
Likely Case
Local network attacker gains shell access to router, modifies configurations, intercepts traffic, or installs persistent backdoors.
If Mitigated
Attack limited to authenticated users or blocked by network segmentation and firewall rules.
🎯 Exploit Status
Proof of concept available on GitHub; exploitation requires network access to router management interface.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: UNKNOWN
Vendor Advisory: UNKNOWN
Restart Required: No
Instructions:
Check TOTOLINK official website for firmware updates. If available, download latest firmware and upload via router web interface under System Tools > Firmware Upgrade.
🔧 Temporary Workarounds
Disable Remote Management
allPrevent external access to router management interface
Network Segmentation
allIsolate router management interface to trusted network segment only
🧯 If You Can't Patch
- Replace vulnerable router with different model
- Implement strict firewall rules blocking all access to router management interface except from trusted management stations
🔍 How to Verify
Check if Vulnerable:
Access router web interface, navigate to System Tools > System Info, check firmware version matches v4.0.0-B20230531.1404Check Version:
curl -s http://router-ip/cgi-bin/luci/ | grep -i versionVerify Fix Applied:
After firmware update, verify version no longer matches vulnerable version📡 Detection & Monitoring
Log Indicators:
- Unusual eval() function calls in system logs
- Unexpected configuration changes
- Unknown process execution
Network Indicators:
- Unusual HTTP POST requests to router management interface
- Suspicious outbound connections from router
SIEM Query:
source="router-logs" AND (eval OR system OR exec) AND NOT user="admin"