Vulnerability in Tp-Link Tl-Wr850n
CVE-2026-4346
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.
EPSS: 0.001 (2.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Tp-link Tl-wr850n — versions 3
- Tp-link Tl-wr850n_firmware
- Tp-link Systems Inc. Tl-wr850n V3 — versions 0
Weakness classification (CWE)
References
- f23511db-6c3e-4e32-a477-6aa17d310630 (Product, patch)
- f23511db-6c3e-4e32-a477-6aa17d310630 (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-4346?
- CVE-2026-4346 is a medium-severity vulnerability in Tp-Link Tl-Wr850n, classified under Cleartext Storage of Sensitive Information. CVSS score: 6.8/10. Published 2026-03-26.
- How severe is CVE-2026-4346?
- Medium severity. CVSS v3 base score is 6.8 out of 10.