CVE-2021-30063: Belden Eagle 20 Tofino 943 987-501-Tx/tx Firmware

High severity, CVSS 7.5. EPSS: 1% chance of exploitation in the next 30 days.

On Schneider Electric ConneXium Tofino OPCLSM TCSEFM0000 before 03.23 and Belden Tofino Xenon Security Appliance, crafted OPC packets can cause an OPC enforcer denial of service.

Affected products

• Belden Eagle 20 Tofino 943 987-501-Tx/tx Firmware: affected versions not specified
• Belden Eagle 20 Tofino 943 987-502 -Tx/mm Firmware: affected versions not specified
• Belden Eagle 20 Tofino 943 987-504-Mm/tx Firmware: affected versions not specified
• Belden Eagle 20 Tofino 943 987-505-Mm/mm Firmware: affected versions not specified
• Belden Tofino Argon Fa-Tsa-100-Tx/tx Firmware: affected versions not specified
• Belden Tofino Argon Fa-Tsa-220-Mm/mm Firmware: affected versions not specified
• Belden Tofino Argon Fa-Tsa-220-Mm/tx Firmware: affected versions not specified
• Belden Tofino Argon Fa-Tsa-220-Tx/mm Firmware: affected versions not specified
• Belden Tofino Argon Fa-Tsa-220-Tx/tx Firmware: affected versions not specified
• Belden Tofino Xenon Security Appliance Firmware: before 03.2.03 (fixed in 03.2.03)
• Schneider Electric TCSEFM0000 Firmware: before 03.23 (fixed in 03.23)

Published 2022-04-03. Last modified 2026-06-17.