CVE-2021-20776: A-Stage-Inc At-40cm01sr Firmware

Critical severity, CVSS 9.8. EPSS: 1.3% chance of exploitation in the next 30 days.

Improper authentication vulnerability in SCT-40CM01SR and AT-40CM01SR allows an attacker to bypass access restriction and execute an arbitrary command via telnet.

Affected products

• A-Stage-Inc At-40cm01sr Firmware: affected versions not specified
• A-Stage-Inc Sct-40cm01sr Firmware: affected versions not specified

Published 2021-07-07. Last modified 2026-06-17.