CVE-2025-12273
BaseFortify
Publication date: 2025-10-27
Last updated on: 2026-02-24
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-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
Can you explain this vulnerability to me?
CVE-2025-12273 is a critical buffer overflow vulnerability in the Tenda CH22 router firmware version 1.0.0.1. It occurs in the fromwebExcptypemanFilter() function, which processes a user-controlled "page" parameter without proper length validation. Specifically, the function uses the unsafe sprintf function to copy input into a fixed-size 256-byte buffer, allowing an attacker to overflow this buffer by sending input larger than 256 bytes. This overflow can overwrite adjacent memory, leading to memory corruption and potentially allowing remote attackers to execute arbitrary code or crash the device. [2, 3, 4]
How can this vulnerability impact me? :
This vulnerability can severely impact the affected device by compromising its confidentiality, integrity, and availability. An attacker can remotely exploit the buffer overflow to cause Denial of Service (DoS) by crashing the web server process, execute arbitrary code to take full control of the router, monitor network traffic, or use the device as a pivot point for further attacks within the network. Exploitation requires no authentication and is considered easy due to the availability of public proof-of-concept exploits. [2, 3, 4]
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/webExcptypemanFilter endpoint with an oversized 'page' parameter (e.g., larger than 256 bytes) to test for buffer overflow behavior. A sample detection command could be a curl command that sends a large payload to this endpoint, such as: curl -X POST -d "page=$(python3 -c 'print("A"*2048)')" http://<target-ip>/goform/webExcptypemanFilter. Monitoring for crashes or abnormal behavior of the router's web server after such a request can indicate the presence of the vulnerability. [3]
What immediate steps should I take to mitigate this vulnerability?
Immediate mitigation steps include restricting access to the vulnerable /goform/webExcptypemanFilter endpoint, applying network-level controls such as firewall rules to block unauthorized remote access, and replacing the affected Tenda CH22 device with a non-vulnerable alternative. Since no official patch or countermeasure is currently available, it is recommended to avoid using the affected firmware version 1.0.0.1. Additionally, applying the principle of least privilege and monitoring network traffic for exploitation attempts can help reduce risk. [2, 3]