Auth bypass in Mbs Ubr-01 Mk Ii
CVE-2025-41764
Due to insufficient authorization enforcement, an unauthorized remote attacker can exploit the wwwupdate.cgi endpoint to upload and apply arbitrary updates.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (34.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 35th percentile — 34.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- Mbs Ubr-01 Mk Ii — versions 0.0.0
- Mbs Ubr-02 — versions 0.0.0
- Mbs Ubr-Lon — versions 0.0.0
- Mbs-Solutions Ubr-01 Mk Ii
- Mbs-Solutions Ubr-02
- Mbs-Solutions Ubr-Lon
- Mbs-Solutions Universal Bacnet Router Firmware
Weakness classification (CWE)
References
- www.mbs-solutions.de/mbs-2025-0001 (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-41764?
- CVE-2025-41764 is a critical-severity vulnerability in Mbs Ubr-01 Mk Ii, classified under Missing Authorization. CVSS score: 9.1/10. Published 2026-03-09.
- How severe is CVE-2025-41764?
- Critical severity. CVSS v3 base score is 9.1 out of 10.