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
EPSS: 0.004 (33.1th percentile) — read the EPSS interpretation.
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.
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
- info@cert.vde.com (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.