CVE-2026-7748 HIGH

CVE-2026-7748: Totolink N300RH POST Request cstecgi.cgi setUpgradeFW buffer overflow

Vendor Totolink
Product N300RH
Weakness CWE-120
Published May 4, 2026
Last update May 4, 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 weakness has been identified in Totolink N300RH 3.2.4-B20220812. Affected by this issue is the function setUpgradeFW of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. Executing a manipulation of the argument FileName can lead to buffer overflow. The attack can be launched remotely. The exploit has been made available to the public and could be used for attacks.

Key dates

02Disclosure timeline

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