An issue was discovered on Topcon Positioning Net-G5 GNSS Receiver devices with firmware 5.2.2. The web interface of the product is protected by a login. A guest is allowed to login. Once logged in as a guest, an attacker can browse a URL to read the password of the administrative user. The same procedure allows a regular user to gain administrative privileges. The guest login is possible in the default configuration.
Severity
CVSS 3.1
8.8 high
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
1.2% chance of exploitation in the next 30 days; higher than 68% of CVEs (scores of 2026-10-31)