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Vulnerability record · CVE-2025-68706 · published 29 December 2025

CVE-2025-68706: Kuwfi ac900 firmware stack-based buffer overflow vulnerability

KKuwfi · Ac900 Firmware

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. This allows an attacker to corrupt adjacent stack memory, crash the web server, and (under certain conditions) may enable arbitrary code execution.

9.8 CVSS 3.1 Critical EPSS 5.0% · top 8.1% CWE-121 · Stack-based buffer overflow
9.8CVSS 3.1 base score
5.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

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. This allows an attacker to corrupt adjacent stack memory, crash the web server, and (under certain conditions) may enable arbitrary code execution.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://drive.proton.me/urls/HJCJYAC7JM#XtHcm3P7QaYk Broken Link
https://github.com/actuator/cve/blob/main/Kuwfi/CVE-2025-68706.txt Third Party Advisory
https://github.com/actuator/cve/tree/main/Kuwfi Third Party Advisory
https://kuwfi.com/products/kuwfi-gigabit-wireless-router-4g-lte-wifi-router-dual-band-portable-wifi-modem-hotspot-64-use Product

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Source: NIST National Vulnerability Database (record CVE-2025-68706), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.