Buffer Overflow Vulnerability in Tenda CH22 Router
CVE-2025-9813

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ch22
Vendor
CVE Published:
2 September 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-9813?

A buffer overflow vulnerability exists in the Tenda CH22 router that affects the function formSetSambaConf located in the /goform/SetSambaConf file. This flaw allows an attacker to manipulate the samba_userNameSda argument, potentially leading to unauthorized access or control over the device. The attack can be executed remotely, and there are publicly available exploits that could be leveraged to exploit this vulnerability, posing a significant risk to users.

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Affected Version(s)

CH22 1.0.0.1

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-2025-9813 - Proof of Concept

References

https://vuldb.com/?id.322140
vdb-entrytechnical-description
https://vuldb.com/?ctiid.322140
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https://vuldb.com/?submit.641151
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

wakaka123 (VulDB User)
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