CVE-2025-68706
Published: 29 December 2025
Description
A stack-based buffer overflow exists in the GoAhead-Webs HTTP daemon on KuWFi 4G LTE AC900 devices with firmware 1.0.13. The /goform/formMultiApnSetting handler uses sprintf() to copy the user-supplied pincode parameter into a fixed 132-byte stack buffer with no bounds checks.…
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This allows an attacker to corrupt adjacent stack memory, crash the web server, and (under certain conditions) may enable arbitrary code execution.
Mitigating Controls (NIST 800-53 r5)AI
Requires validation and bounds checking of user-supplied pincode input to prevent stack buffer overflow in the /goform/formMultiApnSetting handler.
Provides memory protection mechanisms such as stack canaries and non-executable stacks to block exploitation of the stack-based buffer overflow.
Ensures timely flaw remediation by patching the unsafe sprintf usage without bounds checks in the GoAhead-Webs HTTP daemon.
Security SummaryAI
CVE-2025-68706 is a stack-based buffer overflow vulnerability in the GoAhead-Webs HTTP daemon on KuWFi 4G LTE AC900 devices with firmware version 1.0.13. The issue resides in the /goform/formMultiApnSetting handler, which employs sprintf() to copy the user-supplied pincode parameter into a fixed 132-byte stack buffer without bounds checking, as classified under CWE-121 (Stack-based Buffer Overflow). Published on 2025-12-29, it carries a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
An unauthenticated attacker with network access can exploit this vulnerability by submitting a specially crafted HTTP request containing an overly long pincode parameter. This triggers buffer overflow, corrupting adjacent stack memory and enabling denial-of-service via web server crashes. Under certain conditions, the overflow may facilitate arbitrary code execution.
Advisories and additional details are available via the provided references, including a technical report at https://drive.proton.me/urls/HJCJYAC7JM#XtHcm3P7QaYk, exploit details in https://github.com/actuator/cve/blob/main/Kuwfi/CVE-2025-68706.txt, related repository at https://github.com/actuator/cve/tree/main/Kuwfi, and product information at https://kuwfi.com/products/kuwfi-gigabit-wireless-router-4g-lte-wifi-router-dual-band-portable-wifi-modem-hotspot-64-user-with-gigabit-wan-lan-rj11-port. No specific patches or mitigations are detailed in the primary description.
Details
- CWE(s)
Affected Products
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Unauthenticated stack-based buffer overflow in public-facing HTTP daemon (/goform/formMultiApnSetting) exploitable via crafted HTTP request for DoS or potential RCE, directly enabling T1190: Exploit Public-Facing Application.