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TI-2026-03173 Aliases CVE-2026-3678GHSA-w4jv-rg29-ff2w

Tenda FH451 AdvSetWan sub_3C434 stack-based overflow

Priority HIGH 73CWE-119Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0064 50th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
TendaFH4511.0.0.9—No fix listedCNA
  • FH451 VendorTenda Affected 1.0.0.9 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:tenda:fh451_firmware:1.0.0.9:*:*:*:*:*:*:*1.0.0.9VulnerableTenda
cpe:2.3:h:tenda:fh451:-:*:*:*:*:*:*:*not specified by NVDRunning onTenda
  • cpe:2.3:o:tenda:fh451_firmware:1.0.0.9:*:*:*:*:*:*:* Versions 1.0.0.9 Vulnerable ·Tenda
  • cpe:2.3:h:tenda:fh451:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Tenda

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-3678
  2. 2026-10-03 Alias added: GHSA-w4jv-rg29-ff2w
  3. 2026-10-25 EPSS moved to the below the 50th percentile
  4. 2026-11-02 EPSS moved to the 50th–90th percentile

References

Exploit 1

Other 1

  • TI-2024-30872 Tenda FH451 v1.0.0.9 has a command injection vulnerability in the formexeCommand function i CVSS 3.1CRITICAL 9.8
  • TI-2024-30870 Tenda FH451 v1.0.0.9 has a stack overflow vulnerability located in the RouteStatic function. CVSS 3.1CRITICAL 9.8
  • TI-2026-03940 Tenda FH451 WrlclientSet stack-based overflow CVSS 4.0HIGH 8.7
  • TI-2026-03939 Tenda FH451 WrlExtraSet formWrlExtraSet stack-based overflow CVSS 4.0HIGH 8.7
  • TI-2026-03172 Tenda FH451 setcfm fromSetCfm stack-based overflow CVSS 4.0HIGH 8.7
  • TI-2026-02504 Tenda FH451 GstDhcpSetSer buffer overflow CVSS 4.0HIGH 8.7
See all 27 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences