CVE-2025-6393
BaseFortify
Publication date: 2025-06-21
Last updated on: 2025-07-09
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 | * |
| totolink | a3002r_firmware | 4.0.0-b20230531.1404 |
| totolink | a3002r | * |
| totolink | a702r_firmware | 4.0.0-b20230721.1521 |
| totolink | a702r | * |
| totolink | ex1200t_firmware | 4.1.2cu.5232_b20210713 |
| totolink | ex1200t | * |
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-2025-6393 is a critical buffer overflow vulnerability in several TOTOLINK router models (A702R, A3002R, A3002RU, EX1200T) affecting specific firmware versions. The flaw exists in the HTTP POST request handler at the endpoint /boafrm/formIPv6Addr, where improper handling of the 'submit-url' argument allows an attacker to send a specially crafted POST request that overflows a buffer. This can be exploited remotely and may lead to denial of service or other impacts on the device. [1, 5]
How can this vulnerability impact me? :
This vulnerability can impact you by allowing a remote attacker to cause a denial of service (DoS) condition on the affected TOTOLINK routers. It compromises the confidentiality, integrity, and availability of the device, potentially disrupting network connectivity and device operation. Since the exploit is publicly available and easy to execute, affected devices are at significant risk if not updated or replaced. [1, 5]
How can this vulnerability be detected on my network or system? Can you suggest some commands?
This vulnerability can be detected by monitoring HTTP POST requests to the endpoint /boafrm/formIPv6Addr on affected TOTOLINK devices. Specifically, detection involves identifying malicious or unusually large POST requests containing the "submit-url" argument that could trigger the buffer overflow. Network intrusion detection systems (NIDS) or web application firewalls (WAF) can be configured to alert on POST requests to this endpoint. However, no specific detection commands or signatures are provided in the available resources. [1, 2, 3, 4, 5]
What immediate steps should I take to mitigate this vulnerability?
Immediate mitigation steps include replacing the affected TOTOLINK devices or upgrading their firmware to versions that are not vulnerable, if available. Since no known countermeasures or patches currently exist, it is recommended to restrict access to the affected devices' management interfaces, especially blocking remote HTTP POST requests to /boafrm/formIPv6Addr. Network segmentation and applying firewall rules to limit exposure can also help reduce risk until a fix is available. [5]