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Vulnerability Assessment

Weakness
CWE
CWE-1391
OWASP Top 10:2025
A07:2025 - Authentication Failures
ASVS 5.0
V6 - Authentication Strong credential management
Impact

CVSS score of 7.5 (HIGH). 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 high-severity affected system.
This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 0.6% exploitation probability (EPSS)

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AnalysisAI

An unauthenticated remote attacker can perform a brute-force attack on the credentials of the remote service portal with a high chance of success, resulting in connection lost. Rated high severity (CVSS 7.5), 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.

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Technical ContextAI · show details

This vulnerability is classified under CWE-1391. An unauthenticated remote attacker can perform a brute-force attack on the credentials of the remote service portal with a high chance of success, resulting in connection lost. Affected products include: Helmholz Myrex24 V2 Virtual Server, Helmholz Rex 300 Firmware, Helmholz Rex 200 Firmware, Helmholz Rex 250 Firmware, Mbconnectline Mbconnect24.

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

Vendor (cert) PRIMARY 7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Primary rating from Vendor (cert) · only source for this CVE.

CVSS VectorVendor: cert

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

DescriptionCVE.org

An unauthenticated remote attacker can perform a brute-force attack on the credentials of the remote service portal with a high chance of success, resulting in connection lost.

Threat Intelligence Overview

EPSS Score
0.6%
Top 56% exploitable
Data Quality
2 sources
Confidence: Low
NVD CVE.org EPSS

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 HIGH
CISA KEV No
Public POC No
EPSS 0.6%
Patch available No
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
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

39
Low Medium High Critical
KEV: 0
EPSS: +1
CVSS: +38
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information Disclosure MEDIUM

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

Affected Products (CPE)CVE.org

cpe:2.3:a:helmholz:myrex24_v2_virtual_server:*:*:*:*:*:*:*:*
cpe:2.3:o:helmholz:rex_300_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:helmholz:rex_200_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:helmholz:rex_250_firmware:*:*:*:*:*:*:*:*
cpe:2.3:a:mbconnectline:mbconnect24:*:*:*:*:*:*:*:*
cpe:2.3:a:mbconnectline:mymbconnect24:*:*:*:*:*:*:*:*
cpe:2.3:o:mbconnectline:mbspider_mdh_905_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:mbconnectline:mbspider_mdh_915_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:mbconnectline:mbspider_mdh_906_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:mbconnectline:mbspider_mdh_916_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:mbconnectline:mbnet_hw1_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:mbconnectline:mbnet_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:mbconnectline:mbnet.rokey_firmware:*:*:*:*:*:*:*:*

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An issue was discovered in the MB CONNECT LINE mymbCONNECT24 and mbCONNECT24 software in all versions through 2.5.0. Rat
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SQL injection in MB Connect Line's mbCONNECT24 and mymbCONNECT24 platforms allows unauthenticated remote attackers to ex
CVE-2026-33613 HIGH
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Remote code execution in MB Connect Line mbCONNECT24 and mymbCONNECT24 allows high-privileged authenticated attackers to
CVE-2023-0985 HIGH
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An Authorization Bypass vulnerability was found in MB Connect Lines mbCONNECT24, mymbCONNECT24 and Helmholz' myREX24 and
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An issue was discovered in the MB CONNECT LINE mymbCONNECT24 and mbCONNECT24 software in all versions through 2.5.0. Rat
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Privileged remote modification of critical program parameters in MB connect line mbCONNECT24 and mymbCONNECT24 allows au
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An unauthenticated local attacker can decrypt the devices config file and therefore compromise the device due to a weak

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An issue was discovered in the MB CONNECT LINE mymbCONNECT24 and mbCONNECT24 software in all versions through 2.6.1. Rat
CVE-2026-32969 HIGH
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A pre-authentication blind SQL injection vulnerability exists in the userinfo endpoint's authentication method, allowing
CVE-2026-33616 HIGH
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Blind SQL injection in MB Connect Line mbCONNECT24 and mymbCONNECT24 allows unauthenticated remote attackers to extract

CVE-2026-33614 HIGH
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SQL injection in MB Connect Line's mbCONNECT24 and mymbCONNECT24 products allows unauthenticated remote attackers to ext

Same weakness CWE-1391 – Use of Weak Credentials

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CVE-2024-51978 CRITICAL POC
9.8
CVE-2025-52364 HIGH POC
7.5
CVE-2026-22886 CRITICAL
9.8
CVE-2025-67114 CRITICAL
9.8
CVE-2024-12728 CRITICAL
9.8
CVE-2023-0635 CRITICAL
9.8
CVE-2023-31240 CRITICAL
9.8
CVE-2026-109321 CRITICAL
9.3

Same technique Information Disclosure

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CVE-2019-2725 CRITICAL POC
9.8
CVE-2021-34523 CRITICAL POC
9.0
CVE-2013-2251 CRITICAL POC
9.8
CVE-2017-5638 CRITICAL POC
9.8
CVE-2025-24813 CRITICAL POC
9.8
CVE-2025-68613 HIGH POC
8.8
CVE-2015-1701 HIGH POC
7.8
CVE-2017-0147 HIGH POC
7.5

References

Advisories & patches
REF https://cert.vde.com/en/advisories/VDE-2024-068 REF https://cert.vde.com/en/advisories/VDE-2024-069 REF https://www.syss.de/fileadmin/dokumente/Publikationen/Advisories/SYSS-2024-061.txt

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