Buffer overflow in Tenda Fh451
CVE-2026-3678
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…
Vulnerability class: Buffer Overflow
EPSS: 0.001 (27.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R.
Affected products
- Tenda Fh451 — versions 1.0.0.9
Weakness classification (CWE)
References
- VDB-349580 | Tenda FH451 AdvSetWan sub_3C434 stack-based overflow (vdb-entry, technical-description)
- VDB-349580 | CTI Indicators (IOB, IOC, IOA) (signature, permissions-required)
- Submit #765330 | Tenda FH451 V1.0.0.9 Stack-based Buffer Overflow (third-party-advisory)
- github.com/Litengzheng/vul_db/blob/main/FH451/vul_62/README.md (exploit)
- www.tenda.com.cn/ (product)
Frequently asked questions
- What is CVE-2026-3678?
- CVE-2026-3678 is a high-severity vulnerability in Tenda Fh451, classified under Stack-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-03-07.
- How severe is CVE-2026-3678?
- High severity. CVSS v3 base score is 8.8 out of 10.