CVE-2025-11294
Published: 05 October 2025
Description
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
Security Summary
CVE-2025-11294 is a buffer overflow vulnerability affecting the Belkin F9K1015 router running firmware version 1.00.10. The issue resides in an unknown functionality of the web endpoint /goform/formL2TPSetup, where manipulation of the L2TPUserName argument triggers the overflow. Classified under CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) and CWE-120 (Buffer Copy without Checking Size of Input), it carries a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H), indicating high severity due to its potential for remote exploitation.
Attackers with low privileges, such as authenticated users on the device, can exploit this vulnerability remotely without user interaction. Successful exploitation allows arbitrary code execution, potentially granting high-impact confidentiality, integrity, and availability compromises, such as full device takeover. A proof-of-concept exploit is publicly available on GitHub, increasing the risk of widespread abuse.
No official patches or mitigations are available, as the vendor was notified early but has not responded. Security practitioners should consider isolating or decommissioning affected Belkin F9K1015 devices until further notice, monitoring for exploit attempts via the /goform/formL2TPSetup endpoint.
The exploit's public disclosure heightens the urgency, as it may already be in use by threat actors targeting unpatched routers.
Details
- CWE(s)
Affected Products
MITRE ATT&CK Enterprise Techniques
Why these techniques?
Buffer overflow in the remotely accessible web form /goform/formL2TPSetup enables exploitation of a public-facing application for potential remote code execution.