Schneider Electric Modicon Missing Authentication for Critical Function (CVE-2019-6820)

high Tenable OT Security Plugin ID 500856


The remote OT asset is affected by a vulnerability.


A CWE-306: Missing Authentication for Critical Function vulnerability exists which could cause a modification of device IP configuration (IP address, network mask and gateway IP address) when a specific Ethernet frame is received in all versions of: Modicon M100, Modicon M200, Modicon M221, ATV IMC drive controller, Modicon M241, Modicon M251, Modicon M258, Modicon LMC058, Modicon LMC078, PacDrive Eco ,PacDrive Pro, PacDrive Pro2

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Refer to the vendor advisory.

See Also

Plugin Details

Severity: High

ID: 500856

Version: 1.2

Type: remote

Family: Tenable.ot

Published: 3/1/2023

Updated: 9/1/2023

Risk Information


Risk Factor: Medium

Score: 4.2


Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

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

CVSS Score Source: CVE-2019-6820


Risk Factor: High

Base Score: 8.2

Temporal Score: 7.1

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

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

Vulnerability Information

CPE: cpe:/o:schneider-electric:modicon_lmc058_firmware, cpe:/o:schneider-electric:modicon_lmc078_firmware, cpe:/o:schneider-electric:modicon_m100_firmware, cpe:/o:schneider-electric:modicon_m200_firmware, cpe:/o:schneider-electric:modicon_m221_firmware, cpe:/o:schneider-electric:modicon_m241_firmware, cpe:/o:schneider-electric:modicon_m251_firmware, cpe:/o:schneider-electric:modicon_m258_firmware

Required KB Items: Tenable.ot/Schneider

Exploit Ease: No known exploits are available

Patch Publication Date: 5/22/2019

Vulnerability Publication Date: 5/22/2019

Reference Information

CVE: CVE-2019-6820

CWE: 306