CVE-2025-41755 Arbitrary Read with ubr-logread
A low-privileged remote attacker can read arbitrary files on MBS UBR devices via improper validation in the ubr-logread endpoint.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-41755?
CVE-2025-41755 is a medium-severity path traversal vulnerability in MBS UBR-01 Mk II, published on 9 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-22
Which versions are affected by CVE-2025-41755?
It affects 1 product.
Products include Mbs-Solutions Universal Bacnet Router Firmware.
How do I fix CVE-2025-41755?
No fix has been published for CVE-2025-41755 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2025-41755 being exploited?
There is no known exploitation of CVE-2025-41755 in the wild and no public exploit code.
Other vulnerabilities in MBS UBR-01 Mk II
Sources
Also known as GHSA-rff6-q2cw-pw52.