CVE-2026-15701: Totolink NR1800X

Critical severity, CVSS 9.8. EPSS: 1.1% chance of exploitation in the next 30 days.

A weakness has been identified in Totolink NR1800X 9.1.0u.6279_B20210910. Affected by this issue is the function Form_Logout of the file /formLogout.htm of the component lighttpd. This manipulation of the argument Host causes stack-based buffer overflow. The attack is possible to be carried out remotely. The exploit has been made available to the public and could be used for attacks.

Affected products

• Totolink NR1800X: version 9.1.0u.6279_B20210910 only

Published 2026-07-14. Last modified 2026-07-15.