CVE-2025-67188
Buffer Overflow in TOTOLINK A950RG IPv6 Module Enables Remote Exploit
Publication date: 2026-02-03
Last updated on: 2026-02-10
Assigner: MITRE
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| totolink | a950rg_firmware | 4.1.2cu.5204_b20210112 |
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. |
Attack-Flow Graph
AI Powered Q&A
How can this vulnerability be detected on my network or system? Can you suggest some commands?
This vulnerability involves a buffer overflow in the setRadvdCfg interface of the /lib/cste_modules/ipv6.so module, specifically related to the radvdinterfacename parameter. Detection would typically involve monitoring for abnormal behavior or crashes related to this module or interface.
Since the vulnerability is triggered by a remote attacker sending a specially crafted radvdinterfacename parameter, detection could involve capturing and analyzing network traffic for suspicious packets targeting the setRadvdCfg interface.
Specific commands or tools to detect this vulnerability are not explicitly provided in the available resources.
Can you explain this vulnerability to me?
This vulnerability is a buffer overflow found in the TOTOLINK A950RG router firmware version V4.1.2cu.5204_B20210112. It occurs in the setRadvdCfg interface within the /lib/cste_modules/ipv6.so module. Specifically, the function does not properly check the length of the user-controlled parameter called radvdinterfacename, which allows a remote attacker to cause a stack buffer overflow.
How can this vulnerability impact me? :
Exploiting this vulnerability could allow a remote attacker to execute arbitrary code or cause a denial of service on the affected device by triggering a stack buffer overflow. This could lead to unauthorized control over the router, disruption of network services, or compromise of the network environment.
What immediate steps should I take to mitigate this vulnerability?
The provided information does not include explicit mitigation steps or patches for this vulnerability.
General best practices would include restricting access to the vulnerable interface, monitoring for suspicious activity, and applying any available firmware updates from the vendor once released.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know