CVE-2025-14526
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-12-11

Last updated on: 2026-02-24

Assigner: VulDB

Description
A security flaw has been discovered in Tenda CH22 1.0.0.1. This affects the function frmL7ImForm of the file /goform/L7Im. Performing a manipulation of the argument page results in buffer overflow. Remote exploitation of the attack is possible. The exploit has been released to the public and may be used for attacks.
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Meta Information
Published
2025-12-11
Last Modified
2026-02-24
Generated
2026-06-16
AI Q&A
2025-12-11
EPSS Evaluated
2026-06-15
NVD
CVE-2025-14526
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
tenda ch22_firmware 1.0.0.1
tenda ch22 *
Helpful Resources
Exploitability
CWE
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KEV
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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.
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Detection Guidance

This vulnerability can be detected by sending a crafted POST request to the /goform/L7Im endpoint with a large payload in the 'page' parameter to test for buffer overflow behavior. For example, using curl to send a POST request with a payload of 1024 'a' characters to the vulnerable endpoint can help detect if the router becomes unresponsive, indicating exploitation of the buffer overflow. A sample command is: curl -X POST -d "page=$(python3 -c 'print("a"*1024)')" http://<router-ip>/goform/L7Im [3]

Executive Summary

This vulnerability is a security flaw in the Tenda CH22 device, specifically in the function frmL7ImForm of the file /goform/L7Im. It occurs when the argument 'page' is manipulated, causing a buffer overflow. This flaw can be exploited remotely, and the exploit code has been made public.

Impact Analysis

The vulnerability can lead to a buffer overflow, which may allow an attacker to execute arbitrary code remotely on the affected device. This can compromise the device's confidentiality, integrity, and availability, potentially leading to unauthorized access, data theft, or disruption of service.

Mitigation Strategies

There are no known patches or countermeasures available for this vulnerability at the time of disclosure. The recommended immediate mitigation is to replace the affected Tenda CH22 router version 1.0.0.1 with an alternative device to avoid risk. Additionally, restricting access to the router's management interface from untrusted networks and monitoring for suspicious POST requests to /goform/L7Im may help reduce exposure. [2]

Detection Guidance

This vulnerability can be detected by sending a crafted POST request to the /goform/L7Im endpoint with a large payload in the 'page' parameter to test for buffer overflow behavior. For example, using curl, you can send a POST request with a payload of 1024 'a' characters to check if the router becomes unresponsive, indicating the vulnerability. A sample command is: curl -X POST http://<router-ip>/goform/L7Im -d "page=$(python3 -c 'print("a"*1024)')". Monitoring the router's responsiveness after this test can help detect the vulnerability. [3]

Mitigation Strategies

There are no known patches or countermeasures available for this vulnerability at the time of disclosure. The recommended immediate mitigation is to replace the affected Tenda CH22 router version 1.0.0.1 with an alternative device that is not vulnerable. Additionally, restricting remote access to the router's management interface and monitoring for exploit attempts can help reduce risk until a fix is available. [2]

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