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CVE-2026-9543— Totolink N300RH Web Management cstecgi.cgi setPasswordCfg os command injection

CVSS 9.8 · Critical EPSS 0.20% · P42

Possible ATT&CK Techniques 1AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProductVersion RangeStatus
TotolinkN300RH6.1c.1353_B20190305affected
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I. Basic Information for CVE-2026-9543

Vulnerability Information
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Vulnerability Title
Totolink N300RH Web Management cstecgi.cgi setPasswordCfg os command injection
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability has been found in Totolink N300RH 6.1c.1353_B20190305. Affected is the function setPasswordCfg of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. Such manipulation of the argument admpass leads to os command injection. The attack can be executed remotely. The exploit has been disclosed to the public 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
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: NVD (National Vulnerability Database)
Vulnerability Title
TOTOLINK N300RH 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TOTOLINK N300RH是中国吉翁电子（TOTOLINK）公司的一款长距离无线路由器。 TOTOLINK N300RH 6.1c.1353_B20190305版本存在安全漏洞，该漏洞源于Web Management Interface组件中文件/cgi-bin/cstecgi.cgi的setPasswordCfg函数对参数admpass操作不当，可能导致OS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

VendorProductAffected VersionsCPESubscribe
TotolinkN300RH 6.1c.1353_B20190305 cpe:2.3:o:totolink:n300rh_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-9543

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 7122 chars
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III. Intelligence Information for CVE-2026-9543

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Exploits & Public PoCs for CVE-2026-9543 (1)

Same Patch Batch · Totolink · 2026-05-26 · 5 CVEs total

CVE-2026-95346.3 MEDIUMTotolink CA750-PoE Setting cstecgi.cgi setWiFiWpsConfig os command injection
CVE-2026-95336.3 MEDIUMTotolink CA750-PoE Setting cstecgi.cgi recvUpgradeNewFw os command injection
CVE-2026-95326.3 MEDIUMTotolink CA750-PoE Setting cstecgi.cgi setUploadUserData os command injection
CVE-2026-95316.3 MEDIUMTotolink CA750-PoE Setting cstecgi.cgi setUpgradeUboot os command injection

IV. Related Vulnerabilities

Same product: N300RH
Same vendor: Totolink
Same weakness: CWE-78

V. Comments for CVE-2026-9543

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