CVE-2026-4346: tp-link systems inc. tl-wr850n v3

Vulnerability summary

CVE-2026-4346 is a medium (CVSS 6.8) vulnerability in tp-link systems inc. tl-wr850n v3. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 7.5% of scored vulnerabilities.

Timeline

1. 26-03-2026
   PublishedVulnerability first disclosed.
2. 27-03-2026
   Last modifiedVulnerability information updated.

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.

• CWE-312Cleartext Storage of Sensitive InformationThe product stores sensitive information in cleartext within a resource that might be accessible to another control sphere.