CVE-2025-3090Network attack vector

Information disclosure and service interruption via unauthenticated API

Published Jun 24, 2025 · Updated Jun 24, 2025

Missing authentication in mbCONNECT24 and myREX24 portals before 2.18.0 allows remote attackers to disclose data or interrupt service. The VPN-reachable mb24api endpoint accepts requests to sensitive functions without authenticating them, exposing user and device names and enabling targeted denial of service. Network access through the portal VPN is required; the published impact is limited to name disclosure and disruption directed at a specific user or device.

CVSS severity8.2
High
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authentication in mbCONNECT24 and myREX24 portals before 2.18.0 allows remote attackers to disclose data or interrupt service. The VPN-reachable mb24api endpoint accepts requests to sensitive functions without authenticating them, exposing user and device names and enabling targeted denial of service. Network access through the portal VPN is required; the published impact is limited to name disclosure and disruption directed at a specific user or device.

The record

CVE
CVE-2025-3090
Published
Jun 24, 2025
Updated
Jun 24, 2025
Vendor
Helmholz GmbH & Co. KG
Product
myREX24.virtual
Classifications
CWE-306, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 24, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <2.18.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Helmholz GmbH & Co. KG · myREX24.virtualversion=0 <2.18.0
Helmholz GmbH & Co. KG · myREX24version=0 <2.18.0
MB connect line · mbCONNECT24version=0 <2.18.0
MB connect line · mymbCONNECT24version=0 <2.18.0

Published CVSS scores

8.2CERT@VDECVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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