Network Access Control Flaw in MBS Solutions Products
CVE-2025-41759

4.9MEDIUM

Key Information:

Vendor

Mbs

Status
Ubr-01 Mk Ii
Ubr-02
Ubr-lon
Vendor
CVE Published:
9 March 2026

What is CVE-2025-41759?

A flaw in MBS Solutions' network security products allows administrators to incorrectly configure network access by using unsupported values like '*' or 'all' as network identifiers. Instead of triggering a validation error, these values are silently interpreted as network 0, which results in a failure to block any networks. This misconfiguration may leave systems exposed to unauthorized access, highlighting the need for vigilant network access control practices.

Affected Version(s)

UBR-01 Mk II 0.0.0 < 6.0.1.0

UBR-02 0.0.0 < 6.0.1.0

UBR-LON 0.0.0 < 6.0.1.0

References

https://www.mbs-solutions.de/mbs-2025-0001

CVSS V3.1

Score:
4.9
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Adrien Rey from Cyber Defense Campus Zurich
Daniel Hulliger from Armasuisse
.