Buffer overflow in Kuwfi Ac900
CVE-2025-68706
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.
Vulnerability class: Buffer Overflow
EPSS: 0.044 (90.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Kuwfi Ac900
- Kuwfi Ac900_firmware — versions 1.0.13
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (Product)
- cve@mitre.org (Third Party Advisory)
- cve@mitre.org (Broken Link)
- cve@mitre.org (Third Party Advisory)
Frequently asked questions
- What is CVE-2025-68706?
- CVE-2025-68706 is a critical-severity vulnerability in Kuwfi Ac900, classified under Stack-based Buffer Overflow. CVSS score: 9.8/10. Published 2025-12-29.
- How severe is CVE-2025-68706?
- Critical severity. CVSS v3 base score is 9.8 out of 10.