Home/CVE/A vulnerability has been found in TOTOLINK A3700R 9.1.2u.5822_B20200513 and classified as critical. Affected by this vul
CVE

CVE-2025-3665

A vulnerability has been found in TOTOLINK A3700R 9.1.2u.5822_B20200513 and classified as critical. Affected by this vul

A vulnerability has been found in TOTOLINK A3700R 9.1.2u.5822_B20200513 and classified as critical. Affected by this vulnerability is the function setSmartQosCfg of the file /cgi-bin/cstecgi.cgi. The manipulation leads to improper access controls.

The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

MEDIUM · CVSS 5.3 EPSS 0.00266
Schedule remediation
  • Public exploit or PoC is available
  • SSVC automatable: yes - attacks can be scripted at scale
Sigma rules0 YARA rules0
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Weakness Classification

CWE-266Incorrect Privilege Assignment
CWE-284Improper Access Control
▤

Affected Products & Versions

1
totolink a3700r firmwareall versions
⚠

Public Exploits & PoCs

2
poclavender-bicycle-a5a.notion.site · TOTOLINK-A3700R-setSmartQosCfg-1cb53a41781f80ce9b7aca2c6f...lavender-bicycle-a5a.notion.site
poclavender-bicycle-a5a.notion.site · TOTOLINK-A3700R-setSmartQosCfg-1cb53a41781f80ce9b7aca2c6f...lavender-bicycle-a5a.notion.site
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Detection Rules (IDS/IPS)

1
et-openET WEB_SPECIFIC_APPS Totolink A3700R Multiple Authentication Bypass cstecgecgi.cgi Endpoints (CVE-2025-3663 - CVE-2025-3668)web-application-attack
Open rulesets (ET Open, Snort Community, abuse.ch) link to source. Commercial rulesets are reference-only.
▣

Scoring & Timeline

5.3
MEDIUM · CVSS v3.1 · cna@vuldb.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD16 Apr 2025 · 03:15 AM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
SSVC triage · cisa-vulnrichment
Exploitation
poc
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

4
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://vuldb.com/?ctiid.304843Permissions RequiredVDB Entry
https://vuldb.com/?id.304843Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.551297Third Party AdvisoryVDB Entry
https://www.totolink.net/Product
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