CVE-2026-7546 CRITICAL

CVE-2026-7546: Totolink NR1800X lighttpd find_host_ip stack-based overflow

Vendor Totolink
Product NR1800X
Weakness CWE-121
Published May 1, 2026
Last update May 1, 2026

CVSS base score

9.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

What the vulnerability does

01Description

A security vulnerability has been detected in Totolink NR1800X 9.1.0u.6279_B20210910. The impacted element is the function find_host_ip of the component lighttpd. Such manipulation of the argument Host leads to stack-based buffer overflow. The attack can be executed remotely. The exploit has been disclosed publicly and may be used.

Key dates

02Disclosure timeline

May 1, 2026 CVE published
May 1, 2026 Record updated