CVE-2025-66635: Seiko Epson Corporation Web Config

High severity, CVSS 8.6. EPSS: 0.5% chance of exploitation in the next 30 days.

Stack-based buffer overflow vulnerability exists in SEIKO EPSON Web Config. Specially crafted data input by a logged-in user may execute arbitrary code. As for the details of the affected products and versions, see the information provided by the vendor under [References].

Affected products

• Seiko Epson Corporation Web Config

Published 2025-12-16. Last modified 2026-10-07.