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CVE-2026-5178— Totolink A3300R cstecgi.cgi setIptvCfg command injection

Quick assessment

Affected
Totolink A3300R
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 A3300R是中国吉翁电子（TOTOLINK）公司的一款无线路由器。 TOTOLINK A3300R 17.0.0cu.557_b20221024版本存在命令注入漏洞，该漏洞源于对文件/cgi-bin/cstecgi.cgi中参数vlanPriLan3的错误操作，可能导致命令注入。

CVSS 6.3 · Medium EPSS 3.55% · P89

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-5178

Vulnerability Information
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Vulnerability Title
Totolink A3300R cstecgi.cgi setIptvCfg command injection
Source: CVE Program / CVE List V5
Vulnerability Description
A security vulnerability has been detected in Totolink A3300R 17.0.0cu.557_b20221024. Affected by this issue is the function setIptvCfg of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument vlanPriLan3 leads to command injection. Remote exploitation of the attack is possible. The exploit has been disclosed publicly 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 A3300R 命令注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TOTOLINK A3300R是中国吉翁电子（TOTOLINK）公司的一款无线路由器。 TOTOLINK A3300R 17.0.0cu.557_b20221024版本存在命令注入漏洞，该漏洞源于对文件/cgi-bin/cstecgi.cgi中参数vlanPriLan3的错误操作，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 A3300R 17.0.0cu.557_b20221024 cpe:2.3:o:totolink:a3300r_firmware:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-5178

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III. Intelligence Information for CVE-2026-5178

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Proof of Concept for CVE-2026-5178 (1)

Same Patch Batch · Totolink · 2026-03-31 · 3 CVEs total

CVE-2026-5176 7.3 HIGH Totolink A3300R cstecgi.cgi setSyslogCfg command injection
CVE-2026-5177 6.3 MEDIUM Totolink A3300R cstecgi.cgi setWiFiBasicCfg command injection

IV. Related Vulnerabilities

Same product: A3300R
Same vendor: Totolink
Same weakness: CWE-77

V. Comments for CVE-2026-5178

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