CVE-2026-4346
Cleartext Storage of Administrative and Wi-Fi Credentials via Accessible Serial Interface in TP Link's TL-WR850N
- State
- Published
- Severity
- 5.1 Medium
- Published
- Mar 26, 2026
- Updated
- Mar 27, 2026
- Reserved
- Mar 17, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.1 Medium | CVSS:4.0/AV:P/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N | TPLink |
Weaknesses
- CWE-312 Cleartext storage of sensitive information
Affected Products
| Product | Versions |
|---|---|
TL-WR850N v3TP-Link Systems Inc. |
|
References
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