What is the CVSS score of CVE-2025-41765?

CVE-2025-41765 has a CVSS 3.1 base score of 9.1 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H. EPSS exploitation probability: 0.1%.

How to fix or mitigate CVE-2025-41765?

Within 24 hours: Identify all systems running affected software and isolate critical instances from internet-facing networks. Within 7 days: Implement network segmentation to restrict access to wwwupload.cgi endpoints, deploy WAF rules to block unauthorized upload requests, and enable enhanced logging on affected systems. Within 30 days: Monitor vendor advisories for patch availability and establish a testing environment to validate and deploy patches immediately upon release.

Universal Bacnet Router Firmware CVE-2025-41765

CRITICAL

Missing Authorization (CWE-862)

2026-03-09 info@cert.vde.com

Authentication Bypass Universal Bacnet Router Firmware Mbs Solutions

9.1

CVSS 3.1 · NVD

View

Vulnerability Assessment

Weakness	CWE CWE-862 OWASP Top 10:2025 A01:2025 - Broken Access Control ASVS 5.0 V8 - Authorization Authorization checks on every request MITRE ATT&CK 1 technique across 1 tactic: Privilege Escalation The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. Sign in to read
Impact	CVSS 9.1. Multiple unprotected upload endpoints.
Exploit ScenarioDerived	Attacker uploads arbitrary data through unprotected endpoint.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.

No patch listed yet 0.1% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisAIv1 – Mar 12, 2026

Unauthorized file upload via wwwupload.cgi endpoint. Same product as CVE-2025-41764 — second unauthorized upload vector.

Earlier versions of this analysis (1)

v1 Mar 12, 2026 - 21:56 CVSS 9.1

Second unauthorized upload endpoint — wwwupload.cgi.

RemediationAI

Apply vendor patch.

Affects your stack

Find out whether the stacks and servers you run are on an affected version.

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

CWE-862 missing authorization on file upload. Complements firmware upload vulnerability.

Know when Universal Bacnet Router Firmware gets its next vulnerability

Watch products and get an email when something new is published
Check this CVE against your own stack and servers
Exploit and PoC references, threat intelligence from 22 sources

Continue with Google Continue with GitHub

No credit card · 7-day full trial

Severity by source

NVD PRIMARY 9.1 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

High

DescriptionCVE.org

Due to insufficient authorization enforcement, an unauthorized remote attacker can exploit the wwwupload.cgi endpoint to upload and apply arbitrary data. This includes, but is not limited to, contact images, HTTPS certificates, system backups for restoration, server peer configurations, and BACnet/SC server certificates and keys.

Executive ViewAI

Why It Matters

CVE-2025-41765 is a critical vulnerability in the wwwupload.cgi endpoint that allows unauthorized attackers to upload and execute arbitrary data without authentication. This poses an immediate risk to all systems running affected software, potentially enabling complete system compromise, data theft, and service disruption. Immediate mitigation is required as no patch is currently available.

Business Impact: Severe

Compensating Controls

Implement Web Application Firewall (WAF) rules to block wwwupload.cgi requests from untrusted sources. Restrict network access to the affected endpoint using firewall rules and network segmentation. Disable wwwupload.cgi functionality if not operationally critical. Enable comprehensive logging and monitoring of all upload attempts. Implement IP allowlisting for legitimate upload sources. Deploy intrusion detection/prevention systems (IDS/IPS) tuned for exploitation attempts.

Threat Intelligence Overview

EPSS Score

0.1%

Top 82% exploitable

Data Quality

3 sources

Confidence: Low

NVD

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity CRITICAL

CISA KEV No

Public POC No

EPSS 0.1%

Patch available No

Active threat No

Deciding rule

CRITICAL severity

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.