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CVE-2025-3675— TOTOLINK A3700R cstecgi.cgi setL2tpServerCfg access control

Quick assessment

Affected
TOTOLINK A3700R
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 A3700R是中国吉翁电子（TOTOLINK）公司的一款无线路由器。 TOTOLINK A3700R 9.1.2u.5822_B20200513版本存在安全漏洞，该漏洞源于/cgi-bin/cstecgi.cgi文件setL2tpServerCfg函数访问控制不当。

CVSS 5.3 · Medium EPSS 0.56% · P44
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I. Basic Information for CVE-2025-3675

Vulnerability Information
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Vulnerability Title
TOTOLINK A3700R cstecgi.cgi setL2tpServerCfg access control
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was found in TOTOLINK A3700R 9.1.2u.5822_B20200513. It has been rated as critical. Affected by this issue is the function setL2tpServerCfg of the file /cgi-bin/cstecgi.cgi. The manipulation leads to improper access controls. The attack may be launched 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:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
TOTOLINK A3700R 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
TOTOLINK A3700R是中国吉翁电子（TOTOLINK）公司的一款无线路由器。 TOTOLINK A3700R 9.1.2u.5822_B20200513版本存在安全漏洞，该漏洞源于/cgi-bin/cstecgi.cgi文件setL2tpServerCfg函数访问控制不当。
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 A3700R 9.1.2u.5822_B20200513 -

II. Public POCs for CVE-2025-3675

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III. Intelligence Information for CVE-2025-3675

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Vendor Advisories for CVE-2025-3675 (2)

Security Blog Posts for CVE-2025-3675 (1)

Same Patch Batch · TOTOLINK · 2025-04-16 · 8 CVEs total

CVE-2025-3663 5.3 MEDIUM TOTOLINK A3700R Password cstecgi.cgi setWiFiEasyGuestCfg access control
CVE-2025-3664 5.3 MEDIUM TOTOLINK A3700R cstecgi.cgi setWiFiEasyGuestCfg access control
CVE-2025-3665 5.3 MEDIUM TOTOLINK A3700R cstecgi.cgi setSmartQosCfg access control
CVE-2025-3666 5.3 MEDIUM TOTOLINK A3700R cstecgi.cgi setDdnsCfg access control
CVE-2025-3667 5.3 MEDIUM TOTOLINK A3700R cstecgi.cgi setUPnPCfg access control
CVE-2025-3668 5.3 MEDIUM TOTOLINK A3700R cstecgi.cgi setScheduleCfg access control
CVE-2025-3674 5.3 MEDIUM TOTOLINK A3700R cstecgi.cgi setUrlFilterRules access control

IV. Related Vulnerabilities

Same product: A3700R
Same vendor: TOTOLINK
Same weakness: CWE-284

V. Comments for CVE-2025-3675

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