CVE-2025-12241 - CVE House

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Status published High CVE-2025-12241

TOTOLINK A3300R POST Parameter cstecgi.cgi setLanguageCfg stack-based overflow

8.7 CVSS

Vulnerability Description

A vulnerability was detected in TOTOLINK A3300R 17.0.0cu.557_B20221024. This impacts the function setLanguageCfg of the file /cgi-bin/cstecgi.cgi of the component POST Parameter Handler. The manipulation of the argument lang results in stack-based buffer overflow. It is possible to launch the attack remotely. The exploit is now public and may be used.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

yhryhryhr_tu (VulDB User)

References

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TOTOLINK A702R formParentControl sub_418030 buffer overflow

TOTOLINK A702R formOneKeyAccessButton sub_4466F8 buffer overflow

TOTOLINK A702R formFilter sub_4162DC buffer overflow

Affected Vendor

TOTOLINK

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Affected Software

A3300R

Vulnerable Versions:

17.0.0cu.557_B20221024

Timeline

Official Publish: October 27th, 2025

Last Modified: October 27th, 2025

Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

Weaknesses (CWE)

CWE-121 CWE-119

MITRE ATT&CK TTPs

T1190 Exploit Public-Facing Application

T1068 Exploitation for Privilege Escalation

Privilege Escalation

T1055 Process Injection

Defense Evasion

T1105 Ingress Tool Transfer

Command and Control

T1485 Data Destruction

T1203 Exploitation for Client Execution