CVE-2026-15701: Totolink NR1800X lighttpd formLogout.htm Form_Logout stack-based overflow

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-14 · updated 2026-10-24
Weakness: CWE-119

Description

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: 9.1.0u.6279_B20210910

References

https://github.com/fu9-dotom/cve/issues/1
https://vuldb.com/cve/CVE-2026-15701
https://vuldb.com/submit/856136
https://vuldb.com/vuln/378248
https://vuldb.com/vuln/378248/cti
https://www.totolink.net/

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