CVE-2025-12240 HIGH

CVE-2025-12240: TOTOLINK A3300R cstecgi.cgi setDmzCfg buffer overflow

Vendor Totolink
Product A3300R
Weakness CWE-120
Published October 27, 2025
Last update October 27, 2025
View on NVD All CVEs

CVSS base score

8.7/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

What the vulnerability does

01Description

A security vulnerability has been detected in TOTOLINK A3300R 17.0.0cu.557_B20221024. This affects the function setDmzCfg of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument ip leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used.

Key dates

02Disclosure timeline

October 27, 2025 CVE published
October 27, 2025 Record updated