CVE-2026-3678 Details
Description
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.
A stack-based buffer overflow vulnerability has been identified in the Tenda FH451 router, specifically in version 1.0.0.9. The issue arises in the function 'sub_3C434' within the file '/goform/AdvSetWan'. The vulnerability is triggered by manipulating the 'wanmode' and 'PPPOEPassword' parameters. When 'wanmode' is set to 2, the lack of length validation allows for a buffer overflow, which can be exploited remotely. This vulnerability has been publicly disclosed and is associated with the CVE identifier CVE-2026-3678.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 11, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/Litengzheng/vul_db/blob/main/FH451/vul_62/README.md | [email protected] | ExploitIssue Tracking |
| https://vuldb.com/?ctiid.349580 | [email protected] | Permissions RequiredVDB Entry |
| https://vuldb.com/?id.349580 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/?submit.765330 | [email protected] | Third Party AdvisoryVDB Entry |
| https://www.tenda.com.cn/ | [email protected] | Product |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-119 | Improper Restriction of Operations within the Bounds of a Memory Buffer | [email protected] |
| CWE-121 | Stack-based Buffer Overflow | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| tenda fh451 firmware | 1.0.0.9 |
CPE
Remediation
| |
| tenda fh451 | All versions |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Mar 9, 2026 | Initial Analysis | [email protected] |
| Mar 7, 2026 | New CVE Received | [email protected] |