CVE-2025-9443
BaseFortify
Publication date: 2025-08-26
Last updated on: 2025-09-02
Assigner: VulDB
Description
Description
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
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-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. |
| 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. |
Attack-Flow Graph
AI Powered Q&A
What immediate steps should I take to mitigate this vulnerability?
Immediate mitigation steps include avoiding exposure of the vulnerable router to untrusted networks, especially the internet. Restrict access to the /goform/editUserName endpoint by implementing firewall rules or network segmentation. Additionally, monitor the router for crashes or instability that may indicate exploitation attempts. Applying any available firmware updates from the vendor is recommended once released. [1, 2]
Can you explain this vulnerability to me?
This vulnerability is a buffer overflow flaw in the Tenda CH22 router version 1.0.0.1, specifically in the /goform/editUserName endpoint's formeditUserName function. The vulnerability arises because the new_account parameter is not properly validated for length before being copied into a buffer, allowing an attacker to send a specially crafted request with an excessively long new_account value. This causes a stack overflow, which can crash the router and disrupt its normal operation. [1, 2]
How can this vulnerability impact me? :
Exploiting this vulnerability can remotely crash the Tenda CH22 router, causing a denial of service by paralyzing the device. This means the router becomes inaccessible and unable to provide network services, potentially disrupting internet connectivity and network operations for users relying on this device. [1, 2]
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/editUserName endpoint with an excessively long 'new_account' parameter value. For example, using a command like: curl -X POST http://<router-ip>/goform/editUserName -d "new_account=$(python3 -c 'print("a"*1000)')". If the router crashes or becomes unresponsive, it indicates the presence of the vulnerability. [2]