Buffer Overflow Vulnerability in Tenda CH22 Router
CVE-2025-12236

8.7HIGH

Key Information:

Vendor

Tenda
Status
Ch22
Vendor
CVE Published:
27 October 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-12236?

A buffer overflow vulnerability has been identified in the Tenda CH22 router, specifically within the DhcpListClient function. This weakness arises from improper handling of arguments, allowing for potential remote exploitation. If manipulated, this could permit attackers to execute arbitrary code on the affected device, leading to unauthorized access and control. The exploit details have been publicly disclosed, raising concerns for users of the affected model version 1.0.0.1, highlighting the importance of prompt action to mitigate risks.

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-2025-12236 - Proof of Concept

References

https://vuldb.com/?id.329906
vdb-entrytechnical-description
https://vuldb.com/?ctiid.329906
signaturepermissions-required
https://vuldb.com/?submit.673724
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

LINXI666 (VulDB User)
JSON
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CVE-2025-12236 : Buffer Overflow Vulnerability in Tenda CH22 Router