Buffer Overflow Vulnerability in Tenda CH22 Router
CVE-2025-9812

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ch22
Vendor
CVE Published:
2 September 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-9812?

A critical vulnerability has been identified in the Tenda CH22 1.0.0.1 router, specifically within the exeCommand function located in the /goform/exeCommand file. This flaw allows malicious actors to manipulate the cmdinput argument, resulting in a buffer overflow condition. This vulnerability can be exploited remotely, granting unauthorized access or control over the affected device. Prompt updates and security patches are essential to mitigate the risks associated with this publicly disclosed vulnerability. For more information, visit Tenda's official website.

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-2025-9812 - Proof of Concept

References

https://vuldb.com/?id.322139
vdb-entrytechnical-description
https://vuldb.com/?ctiid.322139
signaturepermissions-required
https://vuldb.com/?submit.641148
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)
.
CVE-2025-9812 : Buffer Overflow Vulnerability in Tenda CH22 Router