CVE-2025-8137
BaseFortify
Publication date: 2025-07-25
Last updated on: 2025-07-28
Assigner: VulDB
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| totolink | a702r_firmware | 4.0.0-b20230721.1521 |
| totolink | a702r | * |
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-2025-8137 is a critical buffer overflow vulnerability in the TOTOLINK A702R router firmware version 4.0.0-B20230721.1521. It occurs in the HTTP POST request handler at the /boafrm/formIpQoS endpoint, where improper handling of the 'mac' argument allows an attacker to overflow a buffer by sending a specially crafted request. This can be exploited remotely without authentication, potentially compromising the device's confidentiality, integrity, and availability. [1, 2]
How can this vulnerability impact me? :
This vulnerability can be exploited remotely to cause a buffer overflow on the affected TOTOLINK A702R router, which may lead to denial of service (DoS), and compromise the confidentiality, integrity, and availability of the device. An attacker can disrupt network operations or potentially execute arbitrary code, impacting the security and reliability of your network infrastructure. [1, 2]
How can this vulnerability be detected on my network or system? Can you suggest some commands?
This vulnerability can be detected by monitoring for suspicious HTTP POST requests to the /boafrm/formIpQoS endpoint, especially those containing unusually large or malformed 'mac' argument values that could trigger a buffer overflow. Network intrusion detection systems (NIDS) can be configured to alert on such POST requests. Additionally, manual testing can be done by sending crafted POST requests to the endpoint to check for abnormal behavior or crashes. Specific commands might include using curl or similar tools to send POST requests, for example: curl -X POST http://<router-ip>/boafrm/formIpQoS -d "mac=<malicious_payload>". However, no specific detection commands or signatures are provided in the resources. [1, 2]
What immediate steps should I take to mitigate this vulnerability?
Immediate mitigation steps include replacing the affected TOTOLINK A702R router running firmware version 4.0.0-B20230721.1521 with a non-vulnerable device or firmware version, as no known mitigations or patches are currently available. Limiting network exposure of the device by restricting access to the management interface and monitoring for exploit attempts can also help reduce risk. Since the exploit is publicly available and the attack can be launched remotely without authentication, urgent replacement or isolation of the device is recommended. [1]