CVE-2025-13399
📋 TL;DR
A vulnerability in the TP-Link VX800v v1.0 web interface allows attackers on the same network to brute-force weak AES encryption keys and decrypt intercepted traffic. This affects confidentiality, integrity, and availability of transmitted data. Only users of this specific device version are impacted.
💻 Affected Systems
- TP-Link VX800v
⚠️ 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 compromise of all encrypted communications, allowing attackers to read, modify, or block sensitive data transmitted through the device.
Likely Case
Attackers decrypt intercepted traffic to steal credentials, session tokens, or sensitive information transmitted through the web interface.
If Mitigated
Limited impact if strong network segmentation prevents adjacent attackers or if traffic is additionally encrypted at higher layers.
🎯 Exploit Status
Exploitation requires network adjacency and ability to intercept traffic; brute-forcing weak keys is computationally feasible.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified
Vendor Advisory: https://www.tp-link.com/us/support/faq/4930/
Restart Required: No
Instructions:
Check TP-Link support page for firmware updates; if unavailable, consider workarounds or replacement.
🔧 Temporary Workarounds
Network Segmentation
allIsolate VX800v devices on separate VLANs to limit adjacent attack surface.
Disable Web Interface
allTurn off web management interface if not required, using alternative management methods.
🧯 If You Can't Patch
- Replace device with a model that uses strong encryption or has patched firmware.
- Implement additional encryption layer (e.g., VPN) for all traffic passing through the device.
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via web interface or CLI; if version is v1.0, it is vulnerable.Check Version:
Login to web interface and check System Info or use manufacturer's CLI command if available.Verify Fix Applied:
Verify firmware version is updated beyond v1.0 per vendor guidance.📡 Detection & Monitoring
Log Indicators:
- Unusual login attempts
- Multiple failed decryption attempts in logs if logged
Network Indicators:
- Unusual traffic patterns to/from VX800v
- Brute-force attempts against network services
SIEM Query:
Search for repeated connection attempts to VX800v web interface from internal IPs.