CVE-2026-96257: Fast FAC1203R Gigabit Edition

Critical severity, CVSS 10.0. EPSS: 0.6% chance of exploitation in the next 30 days.

A flaw has been found in Fast FAC1203R Gigabit Edition 2.0.4. Affected by this issue is the function copy_msg_element of the component Device Discovery Service. Executing a manipulation can lead to stack-based buffer overflow. The attack can be executed remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Affected products

• Fast FAC1203R Gigabit Edition: version 2.0.4 only

Published 2026-09-23. Last modified 2026-09-23.