CVE-2025-41758

High

Published: 09 March 2026

Published

09 March 2026

Modified

11 March 2026

KEV Added

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Patch

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CVSS Score v3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Score 0.0054 41.3th percentile

Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2025-41758 is a high-severity Path Traversal (CWE-22) vulnerability in Mbs-Solutions Universal Bacnet Router Firmware. Its CVSS base score is 8.8 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 41.3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-2 (Flaw Remediation).

Deeper analysis

CVE-2025-41758 is an arbitrary file write vulnerability stemming from path traversal (CWE-22) in the wwupload.cgi endpoint. This flaw enables attackers to overwrite arbitrary files on the affected device, potentially leading to full system compromise. The vulnerability carries a CVSS v3.1 base score of 8.8 (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) and was published on 2026-03-09T09:15:59.720.

A low-privileged remote attacker can exploit the wwupload.cgi endpoint over the network with low complexity and no user interaction required. Successful exploitation allows overwriting critical files, granting high-impact confidentiality, integrity, and availability consequences, up to full control of the device.

The primary advisory from MBS Solutions (https://www.mbs-solutions.de/mbs-2025-0001) provides further details on mitigation and patches for this vulnerability.

OWASP Top 10 for Web (2025)

EU & UK References

🇪🇺 ENISA EUVD: EUVD-2025-208362

Vulnerability details

A low-privileged remote attacker can exploit an arbitrary file write vulnerability in the wwupload.cgi endpoint. Due to path traversal this can lead to overwriting arbitrary files on the device and achieving a full system compromise.

CWE(s): CWE-22

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

T1505.003 Web Shell Persistence

Adversaries may backdoor web servers with web shells to establish persistent access to systems.

attack.mitre.org →

Why these techniques?

Path traversal in public-facing wwupload.cgi enables direct exploitation of a web application (T1190) and arbitrary file write to deploy a web shell (T1505.003) for full compromise.

Confidence: HIGH · MITRE ATT&CK Enterprise v19.0