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CVE-2026-1328— Totolink NR1800X POST Request cstecgi.cgi setWizardCfg buffer overflow

Quick assessment

Affected
Totolink NR1800X
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
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版本存在安全漏洞，该漏洞源于对文件/cgi-bin/cstecgi.cgi中参数ssid的错误操作，可能导致缓冲区溢出。

CVSS 8.8 · High EPSS 0.79% · P53

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-1328

Vulnerability Information
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Vulnerability Title
Totolink NR1800X POST Request cstecgi.cgi setWizardCfg buffer overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was detected in Totolink NR1800X 9.1.0u.6279_B20210910. Impacted is the function setWizardCfg of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. Performing a manipulation of the argument ssid results in buffer overflow. The attack may be initiated remotely. The exploit is now public and may be used.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: CVE Program / CVE List V5
Vulnerability Title
TOTOLINK NR1800X 安全漏洞
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版本存在安全漏洞，该漏洞源于对文件/cgi-bin/cstecgi.cgi中参数ssid的错误操作，可能导致缓冲区溢出。
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)

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-2026-1328

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III. Intelligence Information for CVE-2026-1328

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Security Blog Posts for CVE-2026-1328 (1)

Same Patch Batch · Totolink · 2026-01-22 · 3 CVEs total

CVE-2026-1326 6.3 MEDIUM Totolink NR1800X POST Request cstecgi.cgi setWanCfg command injection
CVE-2026-1327 6.3 MEDIUM Totolink NR1800X POST Request cstecgi.cgi setTracerouteCfg command injection

IV. Related Vulnerabilities

Same product: NR1800X
Same vendor: Totolink
Same weakness: CWE-120

V. Comments for CVE-2026-1328

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