Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2025-12239— TOTOLINK A3300R cstecgi.cgi setDdnsCfg buffer overflow

CVSS 8.8 · High EPSS 0.77% · P52

Possible ATT&CK Techniques 1AI

T1190 · Exploit Public-Facing Application
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2025-12239

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
TOTOLINK A3300R cstecgi.cgi setDdnsCfg buffer overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A weakness has been identified in TOTOLINK A3300R 17.0.0cu.557_B20221024. The impacted element is the function setDdnsCfg of the file /cgi-bin/cstecgi.cgi. Executing manipulation can lead to buffer overflow. The attack may be performed from remote. The exploit has been made available to the public and could be exploited.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: CVE Program / CVE List V5
Vulnerability Title
TOTOLINK A3300R 安全漏洞
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版本存在安全漏洞，该漏洞源于文件/cgi-bin/cstecgi.cgi中函数setDdnsCfg存在缓冲区溢出，可能导致远程执行任意代码。
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
TOTOLINKA3300R 17.0.0cu.557_B20221024 -

II. Public POCs for CVE-2025-12239

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 9493 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2025-12239

请登录查看更多情报信息。

Vendor Advisories for CVE-2025-12239 (1)

Proof of Concept for CVE-2025-12239 (1)

Same Patch Batch · TOTOLINK · 2025-10-27 · 6 CVEs total

CVE-2025-122408.8 HIGHTOTOLINK A3300R cstecgi.cgi setDmzCfg buffer overflow
CVE-2025-122418.8 HIGHTOTOLINK A3300R POST Parameter cstecgi.cgi setLanguageCfg stack-based overflow
CVE-2025-122588.8 HIGHTOTOLINK A3300R POST Parameter cstecgi.cg setOpModeCfg stack-based overflow
CVE-2025-122598.8 HIGHTOTOLINK A3300R POST Parameter cstecgi.cgi setScheduleCfg stack-based overflow
CVE-2025-122608.8 HIGHTOTOLINK A3300R POST Parameter cstecgi.cgi setSyslogCfg stack-based overflow

IV. Related Vulnerabilities

Same product: A3300R
Same vendor: TOTOLINK
Same weakness: CWE-120

V. Comments for CVE-2025-12239

No comments yet

Leave a comment