Auth bypass in At&t Arris Bgw210‑700
CVE-2026-16771
In firmware versions 2.7.7 and earlier, the Arris BGW210‑700 gateway fails to enforce any server‑side authentication on its /cgi-bin/*.ha management endpoints, relying solely on client‑side CSS/JavaScript gating that can be bypassed by any…
Vulnerability class: Broken Authentication
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- At&t Arris Bgw210‑700 — versions 0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-16771?
- CVE-2026-16771 is a high-severity vulnerability in At&t Arris Bgw210‑700, classified under Missing Authentication for Critical Function. CVSS score: 8.8/10. Published 2026-07-28.
- How severe is CVE-2026-16771?
- High severity. CVSS v3 base score is 8.8 out of 10.