CVE-2025-7635: Calix Gigacenter Ont

High severity, CVSS 7.7. EPSS: 0.4% chance of exploitation in the next 30 days.

Unauthenticated Telnet access vulnerability in Calix GigaCenter ONT allows root access.This issue affects GigaCenter ONT: 844E, 844G, 844GE, 854GE.

Affected products

• Calix Calix Gigacenter Ont: any version; version 844e only; version 844g only; version 844ge only; version 854ge only

Published 2025-09-09. Last modified 2026-06-17.