CVE-2025-6939
BaseFortify
Publication date: 2025-07-01
Last updated on: 2025-07-07
Assigner: VulDB
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| totolink | a3002ru_firmware | 3.0.0-b20230809.1615 |
| totolink | a3002ru | * |
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-2025-6939 is a critical buffer overflow vulnerability in the TOTOLINK A3002RU router firmware version 3.0.0-B20230809.1615. It occurs in the HTTP POST request handler at the endpoint /boafrm/formWlSiteSurvey, specifically due to improper handling of the 'submit-url' argument. An attacker can send a specially crafted POST request that causes a buffer overflow, potentially disrupting the device's normal operation. [1, 2]
How can this vulnerability impact me? :
This vulnerability can be exploited remotely without authentication, allowing an attacker to cause a denial of service (DoS) on the affected router. It impacts the confidentiality, integrity, and availability of the device, potentially disrupting network connectivity and device functionality. Since the exploit is publicly available, the risk of attack is high. [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 endpoint /boafrm/formWlSiteSurvey with a malicious or unusually large submit-url argument that could trigger a buffer overflow. Network intrusion detection systems (NIDS) or web application firewalls (WAF) can be configured to alert on POST requests to this specific path. Specific commands are not provided in the resources, but using tools like curl or wget to test the endpoint with crafted POST requests could help detect the vulnerability. For example, a command to test might be: curl -X POST http://<router-ip>/boafrm/formWlSiteSurvey -d "submit-url=<large_payload>" to observe if the device crashes or behaves abnormally. [1, 2]
What immediate steps should I take to mitigate this vulnerability?
Immediate mitigation steps include replacing the affected TOTOLINK A3002RU router firmware version 3.0.0-B20230809.1615 with a patched or updated version if available. Since no known mitigations or countermeasures have been identified, it is recommended to avoid using the vulnerable device or isolate it from untrusted networks to prevent remote exploitation. Additionally, monitoring and blocking HTTP POST requests to /boafrm/formWlSiteSurvey can reduce exposure until a fix is applied. [2]