Path Traversal in Mbs Ubr-01 Mk Ii
CVE-2025-41755
A low-privileged remote attacker can exploit the ubr-logread method in wwwubr.cgi to read arbitrary files on the system. The endpoint accepts a parameter specifying the log file to open (e.g., /tmp/weblog{some_number}), but this parameter is not properly validated, allowing an attacker to modify it to reference any file and retrieve its contents.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.005 (43.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 43.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · 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-2025-41755?
- CVE-2025-41755 is a medium-severity vulnerability in Mbs Ubr-01 Mk Ii, classified under Path Traversal. CVSS score: 6.5/10. Published 2026-03-09.
- How severe is CVE-2025-41755?
- Medium severity. CVSS v3 base score is 6.5 out of 10.