Buffer Overflow Vulnerability in Tenda CH22 by Tenda
CVE-2025-9443

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ch22
Vendor
CVE Published:
26 August 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-9443?

A buffer overflow vulnerability exists in the Tenda CH22 router, specifically in the editUserName function found in the /goform/editUserName file. This flaw allows an attacker to manipulate the 'new_account' argument, potentially leading to unauthorized remote code execution. The public availability of exploit code increases the risk of targeted attacks against this device. Users are advised to review their configurations and apply recommended security practices to mitigate potential threats.

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-2025-9443 - Proof of Concept

References

https://vuldb.com/?id.321281
vdb-entrytechnical-description
https://vuldb.com/?ctiid.321281
signaturepermissions-required
https://vuldb.com/?submit.634271
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

moweizhang1994 (VulDB User)
.
CVE-2025-9443 : Buffer Overflow Vulnerability in Tenda CH22 by Tenda