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Bmxnoe0100 Firmware CVE-2024-5056

MEDIUM
Files or Directories Accessible to External Parties (CWE-552)
2024-06-12 cybersecurity@se.com
6.5
CVSS 3.1 · NVD
View

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V5 - File Handling File access restriction
MITRE ATT&CK

2 techniques across 1 tactic: Collection

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Impact

CVSS score of 6.5 (MEDIUM). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required.

Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the medium-severity affected system.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.3% exploitation probability (EPSS)

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AnalysisAI

prevent user to update the device firmware and prevent proper behavior of the webserver when specific files or directories are removed from the filesystem. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified under CWE-552. prevent user to update the device firmware and prevent proper behavior of the webserver when specific files or directories are removed from the filesystem. Affected products include: Schneider-Electric Modicon M340 Firmware, Schneider-Electric Bmxnoe0100 Firmware, Schneider-Electric Bmxnoe0110 Firmware.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 6.5 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
Low

DescriptionNVD

CWE-552: Files or Directories Accessible to External Parties vulnerability exists which may prevent user to update the device firmware and prevent proper behavior of the webserver when specific files or directories are removed from the filesystem.

Threat Intelligence Overview

EPSS Score
0.3%
Top 73% exploitable
Data Quality
2 sources
Confidence: Low

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.3%
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
Yes
Human Impact· derived
Medium

Priority Score

32
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +32
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Path traversal exploits occur when applications use user-controlled input to construct file system paths without proper validation.

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

Affected Products (CPE)NVD

cpe:2.3:o:schneider-electric:modicon_m340_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:bmxnoe0100_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:schneider-electric:bmxnoe0110_firmware:*:*:*:*:*:*:*:*
CVE-2020-7540 CRITICAL
9.8 Dec 11

A CWE-306: Missing Authentication for Critical Function vulnerability exists in the Web Server on Modicon M340, Legacy O

CVE-2020-7533 CRITICAL
9.8 Dec 01

commands on the webserver without authentication when sending specially crafted HTTP requests. Rated critical severity (

CVE-2017-6017 HIGH
7.5 Jun 30

A Resource Exhaustion issue was discovered in Schneider Electric Modicon M340 PLC BMXNOC0401, BMXNOE0100, BMXNOE0110, BM

CVE-2021-22788 HIGH
7.5 Feb 11

A CWE-787: Out-of-bounds Write vulnerability exists that could cause denial of service when an attacker sends a speciall

CVE-2021-22787 HIGH
7.5 Feb 11

A CWE-20: Improper Input Validation vulnerability exists that could cause denial of service of the device when an attack

CVE-2021-22785 HIGH
7.5 Feb 11

A CWE-200: Information Exposure vulnerability exists that could cause sensitive information of files located in the web

CVE-2020-7539 HIGH
7.5 Dec 11

A CWE-754 Improper Check for Unusual or Exceptional Conditions vulnerability exists in the Web Server on Modicon M340, L

CVE-2020-7536 HIGH
7.5 Dec 11

A CWE-754:Improper Check for Unusual or Exceptional Conditions vulnerability exists in Modicon M340 CPUs (BMXP34* versio

CVE-2020-7535 HIGH
7.5 Dec 11

A CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal' Vulnerability Type) vulnerabilit

CVE-2020-7549 MEDIUM
5.3 Dec 11

A CWE-754: Improper Check for Unusual or Exceptional Conditions vulnerability exists in the Web Server on Modicon M340,

CVE-2020-7541 MEDIUM
5.3 Dec 11

A CWE-425: Direct Request ('Forced Browsing') vulnerability exists in the Web Server on Modicon M340, Legacy Offers Modi

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