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

Quick assessment

Affected
Totolink NR1800X
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

TOTOLINK nr1800x是中国TOTOLINK公司的一款无线路由器。 TOTOLINK nr1800x 9.1.0u.6279_B20210910版本存在缓冲区错误漏洞，该漏洞源于组件lighttpd的文件/formLogout.htm中函数Form_Logout对参数Host的操作导致栈缓冲区溢出，攻击者可能远程利用该漏洞。

CVSS 9.8 · Critical EPSS 1.10% · P64

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Totolink NR1800X 9.1.0u.6279_B20210910 affected
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I. Basic Information for CVE-2026-15701

Vulnerability Information
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Vulnerability Title
Totolink NR1800X lighttpd formLogout.htm Form_Logout stack-based overflow
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
TOTOLINK nr1800x 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TOTOLINK nr1800x是中国TOTOLINK公司的一款无线路由器。 TOTOLINK nr1800x 9.1.0u.6279_B20210910版本存在缓冲区错误漏洞，该漏洞源于组件lighttpd的文件/formLogout.htm中函数Form_Logout对参数Host的操作导致栈缓冲区溢出，攻击者可能远程利用该漏洞。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Totolink NR1800X 9.1.0u.6279_B20210910 cpe:2.3:o:totolink:nr1800x_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-15701

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Qwen3.6-35B-A3B · 12009 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-15701

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Other References for CVE-2026-15701 (1)

IV. Related Vulnerabilities

Same product: NR1800X
Same vendor: Totolink
Same weakness: CWE-121

V. Comments for CVE-2026-15701

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