CVE-2025-9812
BaseFortify
Publication date: 2025-09-02
Last updated on: 2025-09-04
Assigner: VulDB
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| tenda | ch22_firmware | 1.0.0.1 |
| tenda | ch22 | * |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-119 | The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data. |
| CWE-120 | The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
CVE-2025-9812 is a buffer overflow vulnerability in the Tenda CH22 router version 1.0.0.1. It occurs in the function formexeCommand within the /goform/exeCommand endpoint, where the cmdinput parameter is not properly checked for length before being processed. An attacker can send a specially crafted request with an oversized cmdinput value, causing a buffer overflow that can crash the router or paralyze the device by making it unresponsive. [1, 2, 3]
How can this vulnerability impact me? :
This vulnerability can allow a remote attacker to cause a denial of service by crashing the router, rendering it inaccessible and paralyzing the device. Exploitation can compromise the confidentiality, integrity, and availability of the device, potentially disrupting network connectivity and operations dependent on the router. [1, 2, 3]
How can this vulnerability be detected on my network or system? Can you suggest some commands?
This vulnerability can be detected by sending a specially crafted POST request to the /goform/exeCommand endpoint of the Tenda CH22 router version 1.0.0.1, specifically targeting the cmdinput parameter with an oversized payload (e.g., 512 bytes of 'a'). If the router crashes or becomes unresponsive, it indicates the presence of the vulnerability. A proof-of-concept Python script exists that performs this test by sending such a payload. Monitoring for unexpected router crashes or denial of service conditions after such requests can also help detect exploitation attempts. [2]
What immediate steps should I take to mitigate this vulnerability?
No known mitigations or countermeasures have been identified for this vulnerability. The recommended immediate step is to replace the affected Tenda CH22 router version 1.0.0.1 with an alternative device not affected by this buffer overflow issue. Additionally, restricting remote access to the /goform/exeCommand endpoint or disabling remote management features, if possible, may reduce exposure until replacement is feasible. [3]