CVE-2017-12739: Siemens Sm-2556 Firmware

Critical severity, CVSS 9.8. EPSS: 5.6% chance of exploitation in the next 30 days.

An issue was discovered on Siemens SICAM RTUs SM-2556 COM Modules with the firmware variants ENOS00, ERAC00, ETA2, ETLS00, MODi00, and DNPi00. The integrated web server (port 80/tcp) of the affected devices could allow unauthenticated remote attackers to execute arbitrary code on the affected device.

Affected products

• Siemens Sm-2556 Firmware: version dnpi00 only; version enos00 only; version erac00 only; version eta2 only; version etls00 only; version modi00 only

Published 2017-11-15. Last modified 2026-06-17.