CVE-2025-14739
📋 TL;DR
An uninitialized pointer vulnerability in TP-Link WR940N and WR941ND routers allows local unauthenticated attackers to cause denial of service and potentially execute arbitrary code with root privileges. This affects users with vulnerable firmware versions on these specific router models. Attackers must have local network access to exploit this vulnerability.
💻 Affected Systems
- TP-Link TL-WR940N
- TP-Link TL-WR941ND
⚠️ 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
Complete router compromise with root-level arbitrary code execution, allowing attackers to intercept traffic, modify configurations, or use the router as a pivot point into the network.
Likely Case
Router crash or denial of service requiring physical reset, disrupting network connectivity for all connected devices.
If Mitigated
Limited impact if routers are isolated from untrusted networks and have restricted physical access.
🎯 Exploit Status
Public technical analysis exists with exploitation details. The vulnerability requires local network access but no authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check TP-Link support for latest firmware updates
Vendor Advisory: https://www.tp-link.com/us/support/faq/4848/
Restart Required: Yes
Instructions:
1. Visit TP-Link support page for your router model. 2. Download latest firmware. 3. Log into router admin interface. 4. Navigate to System Tools → Firmware Upgrade. 5. Upload and install new firmware. 6. Router will reboot automatically.
🔧 Temporary Workarounds
Network Segmentation
allIsolate routers on separate VLANs to limit attack surface from compromised devices
Access Control Lists
allImplement network ACLs to restrict which devices can communicate with router management interfaces
🧯 If You Can't Patch
- Replace affected routers with supported models that receive security updates
- Implement strict network segmentation to isolate routers from untrusted devices
🔍 How to Verify
Check if Vulnerable:
Check router firmware version in admin interface under Status → Firmware VersionCheck Version:
Login to router web interface and check firmware version, or use nmap to identify router model and versionVerify Fix Applied:
Verify firmware version is newer than affected versions listed in advisory📡 Detection & Monitoring
Log Indicators:
- Router crash/reboot logs
- Unusual memory access patterns in system logs
- Failed authentication attempts to router
Network Indicators:
- Unexpected router reboots
- Network connectivity disruptions
- Unusual traffic patterns to router management interface
SIEM Query:
Search for router reboot events or memory access violations in system logs