Vulnerability Description
The vulnerability affecting TL-WR850N v3 allows cleartext storage of administrative and Wi-Fi credentials in a region of the device’s flash memory while the serial interface remains enabled and protected by weak authentication. An attacker with physical access and the ability to connect to the serial port can recover sensitive information, including the router’s management password and wireless network key. Successful exploitation can lead to full administrative control of the device and unauthorized access to the associated wireless network.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Tp-Link | Tl-Wr850N Firmware | < 0.9.1_Build251205 |
| Tp-Link | Tl-Wr850N | 3 |
Related Weaknesses (CWE)
References
- https://www.tp-link.com/in/support/download/tl-wr850n/#FirmwareProduct
- https://www.tp-link.com/us/support/faq/5034/Vendor Advisory
FAQ
What is CVE-2026-4346?
CVE-2026-4346 is a vulnerability with a CVSS score of 6.8 (MEDIUM). The vulnerability affecting TL-WR850N v3 allows cleartext storage of administrative and Wi-Fi credentials in a region of the device’s flash memory while the serial interface remains enabled and protec...
How severe is CVE-2026-4346?
CVE-2026-4346 has been rated MEDIUM with a CVSS base score of 6.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-4346?
Check the references section above for vendor advisories and patch information. Affected products include: Tp-Link Tl-Wr850N Firmware, Tp-Link Tl-Wr850N.