What’s Vulnerable › Vulnerabilities

CVE-2025-3092: MB connect line: Observable response discrepancy in mbCONNECT24/mymbCONNECT24

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-06-24 · updated 2026-06-17
• Weakness: CWE-204

Description

An unauthenticated remote attacker can enumerate valid user names from an unprotected endpoint.

Affected products

• Helmholz myREX24: before 2.18.0; before 2.16.5 — fixed in 2.16.5, 2.18.0
• Helmholz myREX24.virtual: before 2.18.0; before 2.16.5 — fixed in 2.16.5, 2.18.0
• MB connect line mbCONNECT24: before 2.16.5 — fixed in 2.16.5
• MB connect line mymbCONNECT24: before 2.18.0; before 2.16.5 — fixed in 2.16.5, 2.18.0

How to fix

Upgrade to a fixed version: Helmholz myREX24 2.16.5, 2.18.0; Helmholz myREX24.virtual 2.16.5, 2.18.0; MB connect line mbCONNECT24 2.16.5; MB connect line mymbCONNECT24 2.16.5, 2.18.0. Check the vendor advisory for mitigations.

References

• https://certvde.com/en/advisories/VDE-2025-035
• https://certvde.com/en/advisories/VDE-2025-038

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