Detections
Analytics
Schneider (CVE-2018-7791)
critical Tenable OT Security Plugin ID 500849
Synopsis
The remote OT asset is affected by a vulnerability.Description
A Permissions, Privileges, and Access Control vulnerability exists in Schneider Electric's Modicon M221 product (all references, all versions prior to firmware V1.6.2.0). The vulnerability allows unauthorized users to overwrite the original password with their password. If an attacker exploits this vulnerability and overwrite the password, the attacker can upload the original program from the PLC.This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.
Solution
Refer to the vendor advisory.See Also
Plugin Details
Severity: Critical
ID: 500849
File Name: tenable_ot_schneider_CVE-2018-7791.nasl
Version: 1.13
Type: Remote
Family: Tenable.ot
Published: 3/1/2023
Updated: 6/18/2026
Supported Sensors: Tenable OT Security
Risk Information
VPR
Risk Factor: Medium
Score: 5.9
CVSS v2
Risk Factor: High
Base Score: 7.5
Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS Score Source: CVE-2018-7791
CVSS v3
Risk Factor: Critical
Base Score: 9.8
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vulnerability Information
CPE: cpe:/o:schneider-electric:modicon_m221_firmware
Required KB Items: Tenable.ot/Schneider
Exploit Ease: No known exploits are available
Patch Publication Date: 8/29/2018
Vulnerability Publication Date: 8/29/2018
Reference Information
CVE: CVE-2018-7791