Bachmann (CVE-2020-16231)

high Tenable.ot Plugin ID 500654


The remote OT asset is affected by a vulnerability.


The affected Bachmann Electronic M-Base Controllers of version MSYS v1.06.14 and later use weak cryptography to protect device passwords.
Affected controllers that are actively supported include MX207, MX213, MX220, MC206, MC212, MC220, and MH230 hardware controllers, and affected end-of-life controller include MC205, MC210, MH212, ME203, CS200, MP213, MP226, MPC240, MPC265, MPC270, MPC293, MPE270, and CPC210 hardware controllers. Security Level 0 is set at default from the manufacturer, which could allow an unauthenticated remote attacker to gain access to the password hashes. Security Level 4 is susceptible if an authenticated remote attacker or an unauthenticated person with physical access to the device reads and decrypts the password to conduct further attacks.

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Refer to the vendor advisory.

See Also

Plugin Details

Severity: High

ID: 500654

Version: 1.1

Type: remote

Family: Tenable.ot

Published: 6/14/2022

Updated: 6/14/2022

Risk Information


Risk Factor: Medium

Score: 5.9


Risk Factor: Medium

Base Score: 6.5

Vector: AV:N/AC:L/Au:S/C:P/I:P/A:P

CVSS Score Source: CVE-2020-16231


Risk Factor: High

Base Score: 8.8

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

Vulnerability Information

CPE: cpe:/o:bachmann:cpc210_firmware, cpe:/o:bachmann:cs200_firmware, cpe:/o:bachmann:mc205_firmware, cpe:/o:bachmann:mc206_firmware, cpe:/o:bachmann:mc210_firmware, cpe:/o:bachmann:mc212_firmware, cpe:/o:bachmann:mc220_firmware, cpe:/o:bachmann:me203_firmware, cpe:/o:bachmann:mh212_firmware, cpe:/o:bachmann:mh230_firmware, cpe:/o:bachmann:mp213_firmware, cpe:/o:bachmann:mp226_firmware, cpe:/o:bachmann:mpc240_firmware, cpe:/o:bachmann:mpc265_firmware, cpe:/o:bachmann:mpc270_firmware, cpe:/o:bachmann:mpc293_firmware, cpe:/o:bachmann:mpe270_firmware, cpe:/o:bachmann:mx207_firmware, cpe:/o:bachmann:mx213_firmware, cpe:/o:bachmann:mx220_firmware

Required KB Items: Tenable.ot/Bachmann

Exploit Ease: No known exploits are available

Patch Publication Date: 5/19/2022

Vulnerability Publication Date: 5/19/2022

Reference Information

CVE: CVE-2020-16231

CWE: 916