How severe is CVE-2025-41756?

CVE-2025-41756 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2025-41756 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-41756?

CVE-2025-41756 affects Mbs-solutions Universal Bacnet Router Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-41756?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-41756 have an EU (EUVD) identifier?

Yes. CVE-2025-41756 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-208358.

When was CVE-2025-41756 published?

CVE-2025-41756 was published on 2026-03-09 and last updated on 2026-06-17.

CVE-2025-41756

CVE-2025-41756 is a high-severity vulnerability in Mbs-solutions Universal Bacnet Router Firmware with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1242.

Key facts

Severity: High (CVSS 3.x base score 8.1)
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-208358
Weakness: CWE-1242
Affected product: Mbs-solutions Universal Bacnet Router Firmware
Published: 2026-03-09
Last modified: 2026-06-17

Description

A low-privileged remote attacker can exploit the ubr-editfile method in wwwubr.cgi, an undocumented and unused API endpoint to write arbitrary files on the system.

Frequently asked questions

What is CVE-2025-41756?: A low-privileged remote attacker can exploit the ubr-editfile method in wwwubr.cgi, an undocumented and unused API endpoint to write arbitrary files on the system.
How severe is CVE-2025-41756?: CVE-2025-41756 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2025-41756 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-41756?: CVE-2025-41756 affects Mbs-solutions Universal Bacnet Router Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-41756?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-41756 have an EU (EUVD) identifier?: Yes. CVE-2025-41756 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-208358.
When was CVE-2025-41756 published?: CVE-2025-41756 was published on 2026-03-09 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:o:mbs-solutions:universal_bacnet_router_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Mbs-solutions Universal Bacnet Router Firmware

CVE-2025-41765 — Critical (CVSS 9.1): Due to insufficient authorization enforcement, an unauthorized remote attacker can exploit the wwwupload.cgi endpoint…
CVE-2025-41764 — Critical (CVSS 9.1): Due to insufficient authorization enforcement, an unauthorized remote attacker can exploit the wwwupdate.cgi endpoint…
CVE-2025-41766 — High (CVSS 8.8): A low-privileged remote attacker can trigger a stack-based buffer overflow via a crafted HTTP POST request using the…
CVE-2025-41758 — High (CVSS 8.8): A low-privileged remote attacker can exploit an arbitrary file write vulnerability in the wwupload.cgi endpoint. Due to…
CVE-2025-41757 — High (CVSS 8.8): A low-privileged remote attacker can abuse the backup restore functionality of UBR (ubr-restore) which runs with…
CVE-2025-41761 — High (CVSS 7.8): A low‑privileged local attacker who gains access to the UBR service account (e.g., via SSH) can escalate privileges…

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