CVE-2025-12239 HIGH

CVE-2025-12239: TOTOLINK A3300R cstecgi.cgi setDdnsCfg 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 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.

Key dates

02Disclosure timeline

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