CVE-2026-3678 HIGH

CVE-2026-3678: Tenda FH451 AdvSetWan sub_3C434 stack-based overflow

Vendor Tenda
Product FH451
Weakness CWE-121
Published March 7, 2026
Last update March 11, 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 vulnerability was determined in Tenda FH451 1.0.0.9. Affected is the function sub_3C434 of the file /goform/AdvSetWan. This manipulation of the argument wanmode/PPPOEPassword causes stack-based buffer overflow. It is possible to initiate the attack remotely. The exploit has been publicly disclosed and may be utilized.

Key dates

02Disclosure timeline

March 7, 2026 CVE published
March 11, 2026 Record updated