Buffer Overflow Vulnerability in Tenda FH1203 Router
CVE-2025-6113

8.7HIGH

Key Information:

Vendor

Tenda
Status
Fh1203
Vendor
CVE Published:
16 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-6113?

A security flaw has been identified in the Tenda FH1203 router, specifically within the AdvSetLanip function of the /goform/AdvSetLanip file. This vulnerability arises due to improper handling of the lanMask argument, which can lead to a buffer overflow condition. Attackers can exploit this weakness remotely, potentially gaining unauthorized access and control of the affected device. The exploit has been publicly disclosed, making it imperative for users to apply the necessary security measures.

Affected Version(s)

FH1203 2.0.1.6

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-2025-6113 - Proof of Concept

References

https://vuldb.com/?id.312582
vdb-entrytechnical-description
https://vuldb.com/?ctiid.312582
signaturepermissions-required
https://vuldb.com/?submit.592478
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

yhryhryhr_backup (VulDB User)
.
CVE-2025-6113 : Buffer Overflow Vulnerability in Tenda FH1203 Router