Stack-Based Buffer Overflow in Tenda FH1202 Router by Tenda
CVE-2026-3808

8.7HIGH

Key Information:

Vendor

Tenda
Status
Fh1202
Vendor
CVE Published:
9 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-3808?

A stack-based buffer overflow vulnerability exists in the webtypelibrary function of Tenda FH1202 routers. An attacker can exploit this flaw by manipulating the webSiteId parameter, potentially allowing remote code execution. The affected version is V1.2.0.14(408), and this vulnerability is now publicly known, increasing the urgency for affected users to implement necessary security measures.

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Affected Version(s)

FH1202 1.2.0.14(408)

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-3808 - Proof of Concept

References

https://vuldb.com/?id.349774
vdb-entrytechnical-description
https://vuldb.com/?ctiid.349774
signaturepermissions-required
https://vuldb.com/?submit.769023
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Manner814 (VulDB User)
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