CVE-2025-34319
📋 TL;DR
This CVE describes an unauthenticated OS command injection vulnerability in TOTOLINK N300RT wireless router firmware, allowing remote attackers to execute arbitrary commands via crafted requests to the Boa formWsc functionality. It affects users of TOTOLINK N300RT routers with firmware versions prior to V3.4.0-B20250430, potentially compromising router security and network integrity.
💻 Affected Systems
- TOTOLINK N300RT wireless router
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
An attacker could gain full control of the router, modify configurations, intercept network traffic, deploy malware to connected devices, or use the router as a pivot point for further attacks on the internal network.
Likely Case
Attackers may exploit this to disrupt network services, steal sensitive data passing through the router, or use the compromised device in botnets for DDoS attacks.
If Mitigated
If proper network segmentation and access controls are in place, impact may be limited to the router itself, though it could still serve as an entry point for lateral movement.
🎯 Exploit Status
Exploitation involves sending crafted HTTP requests with malicious parameters, which is straightforward given the unauthenticated nature and command injection flaw.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: V3.4.0-B20250430
Vendor Advisory: https://totolink.tw/support_view/N300RT
Restart Required: Yes
Instructions:
1. Download the latest firmware from the TOTOLINK support page. 2. Log into the router's web interface. 3. Navigate to the firmware upgrade section. 4. Upload and apply the new firmware file. 5. Wait for the router to reboot and verify the update.
🔧 Temporary Workarounds
Disable Remote Management
allTurn off remote access to the router's web interface to prevent exploitation from external networks.
Restrict Network Access
allUse firewall rules to limit access to the router's management interface to trusted IP addresses only.
🧯 If You Can't Patch
- Isolate the router on a dedicated network segment to limit potential lateral movement.
- Monitor network traffic for unusual outbound connections or command injection attempts.
🔍 How to Verify
Check if Vulnerable:
Check the firmware version via the router's web interface under System Status or similar sections; if it is earlier than V3.4.0-B20250430, it is likely vulnerable.Check Version:
Log into the router's web interface and navigate to the system information page; no direct command is provided as it varies by interface.Verify Fix Applied:
After updating, confirm the firmware version shows V3.4.0-B20250430 or later in the router's interface.📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP requests to formWsc endpoints with suspicious parameters in router logs.
Network Indicators:
- Anomalous outbound connections from the router or spikes in management interface traffic.
SIEM Query:
Search for HTTP requests containing 'targetAPSsid' with shell metacharacters or command injection patterns in web server logs.