Schneider Modicon M580/Quantum Communication Modules Out-of-bounds Write (CVE-2021-29999)

critical Tenable OT Security Plugin ID 504813

Synopsis

The remote OT asset is affected by a vulnerability.

Description

An issue was discovered in Wind River VxWorks through 6.8. There is a possible stack overflow in dhcp server.

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.

Plugin Details

Severity: Critical

ID: 504813

Version: 1.1

Type: remote

Family: Tenable.ot

Published: 11/22/2025

Updated: 11/22/2025

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

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:bmxcra31210_firmware, cpe:/o:schneider-electric:bmxcra31200_firmware, cpe:/o:schneider-electric:bmecra31210_firmware, cpe:/o:schneider-electric:140cra31908_firmware, cpe:/o:schneider-electric:bmenoc0321_firmware, cpe:/o:schneider-electric:140cra31200_firmware

Required KB Items: Tenable.ot/Schneider

Exploit Ease: No known exploits are available

Patch Publication Date: 1/14/2025

Vulnerability Publication Date: 4/13/2021

Reference Information

CVE: CVE-2021-29999

CWE: 787

ICSA: 25-058-01

Detections

Analytics