CVE-2026-15701
CriticalCVSS 9.8Exploitation Probability (EPSS)
Elevated risk65th percentile - higher than 65% of all known CVEs
Summary
A vulnerability has been found in Totolink NR1800X firmware version 9.1.0u.6279_B20210910 in the Form_Logout function of the /formLogout.htm file within the lighttpd component. Manipulation of the Host argument causes a stack-based buffer overflow, which can be exploited remotely.
Risk Assessment
An attacker can remotely take control of the device, leading to network integrity and availability breaches and potential data interception.
Recommendation
Immediately update the Totolink NR1800X firmware to the latest version if a patch is available, or consider replacing the device with one not affected by this vulnerability.
Other vulnerabilities in lighttpd
See all- CVE-2026-7546Critical
A security vulnerability has been detected in Totolink NR1800X version 9.1.0u.6279_B20210910 in the function find_host_ip of the lighttpd component. Manipulation of the Host argument leads to stack-based buffer overflow.
- CVE-2025-12642Critical
lighttpd 1.4.80 incorrectly merges trailer fields into headers after HTTP request parsing. This behavior can be exploited to conduct HTTP Header Smuggling attacks. Successful exploitation may allow an attacker to bypass access control rules, inject unsafe input into backend logic that trusts request headers, and execute HTTP Request Smuggling attacks under some conditions.
- CVE-2014-2323Critical
SQL injection vulnerability in mod_mysql_vhost.c in lighttpd before 1.4.35 allows remote attackers to execute arbitrary SQL commands via the host name, related to request_check_hostname.
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS