CVE-2021-33841: Circutor Sge-PLC1000 Firmware

Critical severity, CVSS 9.8. EPSS: 2.2% chance of exploitation in the next 30 days.

SGE-PLC1000 device, in its 0.9.2b firmware version, does not handle some requests correctly, allowing a remote attacker to inject code into the operating system with maximum privileges.

Affected products

• Circutor Sge-PLC1000 Firmware: version 0.9.2b only

Published 2021-06-09. Last modified 2026-06-17.