CVE-2026-3678
HIGHCVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
3Description
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.
Analysis
Remote code execution in Tenda FH451 firmware via stack-based buffer overflow in the WAN configuration endpoint allows unauthenticated attackers to achieve full system compromise through malicious wanmode or PPPOEPassword parameters. Public exploit code exists for this vulnerability, and no patch is currently available. …
Sign in for full analysis, threat intelligence, and remediation guidance.
Remediation
Within 24 hours: Inventory all Tenda FH451 1.0.0.9 devices in your environment and isolate affected units from production networks if possible. Within 7 days: Implement network segmentation to restrict administrative access to these devices and enable enhanced logging on network perimeter devices. …
Sign in for detailed remediation steps.
Priority Score
Share
External POC / Exploit Code
Leaving vuln.today