CVE-2017-7575: Schneider Electric Modicon TM221CE16R Firmware

Critical severity, CVSS 9.8. EPSS: 4% chance of exploitation in the next 30 days.

Schneider Electric Modicon TM221CE16R 1.3.3.3 devices allow remote attackers to discover the application-protection password via a \x00\x01\x00\x00\x00\x05\x01\x5a\x00\x03\x00 request to the Modbus port (502/tcp). Subsequently the application may be arbitrarily downloaded, modified, and uploaded.

Affected products

Published 2017-04-06. Last modified 2026-06-17.