Schneider Electric Quantum Ethernet Module Permissions, Privileges, and Access Controls (CVE-2011-4861)

critical Tenable OT Security Plugin ID 500059


The remote OT asset is affected by a vulnerability.


The modbus_125_handler function in the Schneider Electric Quantum Ethernet Module on the NOE 771 device (aka the Quantum 140NOE771* module) allows remote attackers to install arbitrary firmware updates via a MODBUS 125 function code to TCP port 502.

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Refer to the vendor advisory.

See Also

Plugin Details

Severity: Critical

ID: 500059

Version: 1.6

Type: remote

Family: Tenable.ot

Published: 2/7/2022

Updated: 12/14/2023

Supported Sensors: Tenable OT Security

Risk Information


Risk Factor: Medium

Score: 6.0


Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2011-4861


Risk Factor: Critical

Base Score: 9.1

Temporal Score: 8.2

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:schneider-electric:quantum_ethernet_module_140noe77101, cpe:/a:schneider-electric:quantum_ethernet_module_140noe77111, cpe:/a:schneider-electric:quantum_ethernet_module_140noe77100

Required KB Items: Tenable.ot/Schneider

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 12/17/2011

Vulnerability Publication Date: 12/17/2011

Reference Information

CVE: CVE-2011-4861

CWE: 264