CVE-2026-7546— Totolink NR1800X lighttpd find_host_ip stack-based overflow
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I. Basic Information for CVE-2026-7546
Vulnerability Information
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Vulnerability Title
Totolink NR1800X lighttpd find_host_ip stack-based overflow
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
栈缓冲区溢出
Source: NVD (National Vulnerability Database)
Vulnerability Title
TOTOLINK NR1800X 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TOTOLINK NR1800X是中国吉翁电子（TOTOLINK）公司的一款出色的 5G NR 室内Wi-Fi和SIP CPE。旨在为家庭和办公室提供快速便捷的 NR 固定数据服务部署。 TOTOLINK NR1800X 9.1.0u.6279_B20210910版本存在缓冲区错误漏洞，该漏洞源于lighttpd组件中find_host_ip函数对参数Host的操作，可能导致栈缓冲区溢出。
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)
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Affected Products
II. Public POCs for CVE-2026-7546
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- CVE-2026-7546 | Totolink NR1800X 9.1.0u.6279_B20210910 lighttpd find_host_ip Host stack-based overflowvdb-entrytechnical-description
- https://nvd.nist.gov/vuln/detail/CVE-2026-7546
Same Patch Batch · Totolink · 2026-05-01 · 3 CVEs total
| CVE-2026-7538 | 9.8 CRITICAL | Totolink A8000RU CGI cstecgi.cgi vulnerability os command injection |
| CVE-2026-7548 | 8.8 HIGH | Totolink NR1800X cstecgi.cgi sub_41A68C command injection |
IV. Related Vulnerabilities
Same product: NR1800X
- CVE-2026-7548
Totolink NR1800X cstecgi.cgi sub_41A68C command injection - CVE-2026-5030
Totolink NR1800X Telnet Service cstecgi.cgi NTPSyncWithHost - CVE-2026-1328
Totolink NR1800X POST Request cstecgi.cgi setWizardCfg buffe - CVE-2026-1327
Totolink NR1800X POST Request cstecgi.cgi setTracerouteCfg c - CVE-2026-1326
Totolink NR1800X POST Request cstecgi.cgi setWanCfg command
Same vendor: Totolink
- CVE-2026-8137
Totolink X5000R formDdns sub_458E40 buffer overflow - CVE-2026-7823
Totolink A8000RU cstecgi.cgi setAppFilterCfg os command inje - CVE-2026-7750
Totolink N300RH POST Request cstecgi.cgi setMacFilterRules b - CVE-2026-7749
Totolink N300RH POST Request cstecgi.cgi setWanConfig buffer - CVE-2026-7748
Totolink N300RH POST Request cstecgi.cgi setUpgradeFW buffer
Same weakness: CWE-121
- CVE-2026-8258
Squirrel sqstdstring.cpp validate_format stack-based overflo - CVE-2026-8234
EFM ipTIME A8004T WifiBasicSet formWifiBasicSet stack-based - CVE-2026-6665
PgBouncer buffer overflow in SCRAM - CVE-2026-41509
Integer underflow in crypto_sign_open() leads to buffer over - CVE-2026-8138
Tenda CX12L SetPptpServerCfg” formSetPPTPServer stack-based
V. Comments for CVE-2026-7546
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