CVE-2026-7749 HIGH

CVE-2026-7749: Totolink N300RH POST Request cstecgi.cgi setWanConfig buffer overflow

Vendor Totolink
Product N300RH
Weakness CWE-120
Published May 4, 2026
Last update May 5, 2026
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 N300RH 3.2.4-B20220812. This affects the function setWanConfig of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. The manipulation of the argument priDns leads to buffer overflow. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used.

Key dates

02Disclosure timeline

May 4, 2026 CVE published
May 5, 2026 Record updated