CVE-2025-6627
BaseFortify
Publication date: 2025-06-25
Last updated on: 2025-07-16
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-2025-6627 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 endpoint /boafrm/formIpv6Setup, specifically through manipulation of the submit-url parameter. The vulnerability arises because the device copies input data to an output buffer without checking the input size, leading to a buffer overflow. This can be exploited remotely by sending a specially crafted POST request, potentially causing denial of service or other impacts. [1, 2]
How can this vulnerability impact me? :
This vulnerability can be exploited remotely without authentication, allowing attackers to cause denial of service (DoS) conditions or potentially compromise the confidentiality, integrity, and availability of the affected device. Exploitation is straightforward due to a public proof-of-concept exploit. The impact includes disruption of device operation and possible unauthorized control or data exposure. [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 HTTP POST requests to the endpoint /boafrm/formIpv6Setup on the TOTOLINK A702R router. Specifically, look for suspicious or unusually large payloads manipulating the submit-url parameter, which may indicate an attempt to trigger the buffer overflow. Network intrusion detection systems (NIDS) can be configured to alert on POST requests to this endpoint. Additionally, you can use tools like curl or wget to test the endpoint manually by sending crafted POST requests to observe abnormal behavior or crashes. Example command to test the endpoint: curl -X POST http://<router-ip>/boafrm/formIpv6Setup -d "submit-url=<large_payload>". Replace <large_payload> with a long string to simulate the overflow attempt. [1, 2]
What immediate steps should I take to mitigate this vulnerability?
Immediate mitigation steps include restricting access to the affected router's management interface from untrusted networks to prevent remote exploitation. Disable remote management if enabled. Since no known patches or countermeasures are published, consider replacing the affected device or firmware version with a secure alternative. Monitor the device for unusual behavior or crashes that may indicate exploitation attempts. Applying network-level protections such as firewall rules to block POST requests to /boafrm/formIpv6Setup can also help reduce risk. [2]