CVE-2025-6519: Copeland e3 Supervisory Controller Firmware

Critical severity, CVSS 9.8. EPSS: 0.5% chance of exploitation in the next 30 days.

E3 Site Supervisor (firmware version < 2.31F01) has a default admin user "ONEDAY" with a daily generated password. An attacker can predictably generate the password for ONEDAY. The oneday user cannot be deleted or modified by any user.

Affected products

• Copeland e3 Supervisory Controller Firmware: before 2.31f01 (fixed in 2.31f01)

Published 2025-09-02. Last modified 2026-06-17.