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CVE-2026-5030— Totolink NR1800X Telnet Service cstecgi.cgi NTPSyncWithHost command injection

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版本存在命令注入漏洞，该漏洞源于组件Telnet Service中文件/cgi-bin/cstecgi.cgi的函数NTPSyncWithHost对参数host_time操作不当，可能导致命令注入。

CVSS 6.3 · Medium EPSS 2.28% · P82

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-5030

Vulnerability Information
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Vulnerability Title
Totolink NR1800X Telnet Service cstecgi.cgi NTPSyncWithHost command injection
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability has been found in Totolink NR1800X 9.1.0u.6279_B20210910. This issue affects the function NTPSyncWithHost of the file /cgi-bin/cstecgi.cgi of the component Telnet Service. The manipulation of the argument host_time leads to command injection. The attack can be initiated remotely. The exploit has been disclosed to the 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:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
在命令中使用的特殊元素转义处理不恰当(命令注入)
Source: CVE Program / CVE List V5
Vulnerability Title
TOTOLINK NR1800X 命令注入漏洞
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版本存在命令注入漏洞，该漏洞源于组件Telnet Service中文件/cgi-bin/cstecgi.cgi的函数NTPSyncWithHost对参数host_time操作不当，可能导致命令注入。
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-2026-5030

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III. Intelligence Information for CVE-2026-5030

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Vendor Advisories for CVE-2026-5030 (2)

Security Blog Posts for CVE-2026-5030 (1)

Same Patch Batch · Totolink · 2026-03-29 · 3 CVEs total

CVE-2026-5101 6.3 MEDIUM Totolink A3300R Parameter cstecgi.cgi setLanCfg command injection
CVE-2026-5020 6.3 MEDIUM Totolink A3600R Parameter cstecgi.cgi setNoticeCfg command injection

IV. Related Vulnerabilities

Same product: NR1800X
Same vendor: Totolink
Same weakness: CWE-77

V. Comments for CVE-2026-5030

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