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.

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

Published 2025-12-29 · last modified 2026-06-17.

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.

EPSS exploit prediction

EPSS: 0.050 (91.9th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 91.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.049 · newest: 0.050 · change: +0.001

Affected products

Kuwfi Ac900
Kuwfi Ac900 Firmware — versions 1.0.13

Weakness classification (CWE)

CWE-121 — Stack-based Buffer Overflow

References

kuwfi.com/products/kuwfi-gigabit-wireless-router-4g-lte-wifi-router-dual-band-p… (Product)
github.com/actuator/cve/tree/main/Kuwfi (Third Party Advisory)
drive.proton.me/urls/HJCJYAC7JM (Broken Link)
github.com/actuator/cve/blob/main/Kuwfi/CVE-2025-68706.txt (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.