CVE-2026-0839: Utt 520w Firmware

High severity, CVSS 8.8. EPSS: 1.1% chance of exploitation in the next 30 days.

A weakness has been identified in UTT 进取 520W 1.7.7-180627. Affected is the function strcpy of the file /goform/APSecurity. Executing a manipulation of the argument wepkey1 can lead to buffer overflow. The attack may be performed from remote. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

Affected products

• Utt 520w Firmware: up to and including 1.7.7-180627

Published 2026-01-11. Last modified 2026-06-17.