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

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-01 · updated 2026-10-26
Weakness: CWE-119

Description

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.

Affected products

Totolink NR1800X: 9.1.0u.6279_B20210910

References

https://github.com/newym/cve/blob/main/totolinknr1800x.md
https://vuldb.com/submit/804404
https://vuldb.com/vuln/360357
https://vuldb.com/vuln/360357/cti
https://www.totolink.net/

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