What is the CVSS score of CVE-2025-63362?

CVE-2025-63362 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.2%.

Is there a public PoC exploit available for CVE-2025-63362?

Yes, a public proof-of-concept exploit is available for CVE-2025-63362. Prioritise patching immediately. EPSS: 0.2%.

How to fix or mitigate CVE-2025-63362?

Within 24 hours: Identify and inventory all Waveshare RS232/485 to WiFi/ETH (B) devices running firmware V3.1.1.0 and isolate them from production networks if possible. Within 7 days: Implement network segmentation to restrict device access, disable remote management features, and apply firewall rules to limit administrative access to known trusted IP ranges only. Within 30 days: Contact Waveshare for patch availability and timeline; evaluate replacement with alternative vendors if patches are unavailable within 60 days, and implement continuous monitoring for unauthorized authentication attempts on remaining devices.

Rs232 485 To Wifi Eth B Firmware CVE-2025-63362

EUVD-2025-201260 CRITICAL

Unverified Password Change (CWE-620)

2025-12-04 cve@mitre.org

Authentication Bypass Rs232 485 To Wifi Eth B Firmware Waveshare

9.8

CVSS 3.1 · NVD

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Vulnerability Assessment

Weakness	CWE CWE-620 OWASP Top 10:2025 A07:2025 - Authentication Failures ASVS 5.0 V6 - Authentication Password change verification
Impact	Unauthorized access to protected functionality, data, or administrative interfaces, potentially leading to full system compromise. With a CVSS score of 9.8 (CRITICAL), this represents a critical risk.
Exploit ScenarioDerived	An attacker manipulates authentication tokens, exploits logic flaws, or uses default credentials to bypass the login mechanism and access restricted areas.

Act Now Prioritize within 24-48h. Why: CRITICAL severity + public POC available.

No patch listed yet 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 15, 2026

Waveshare RS232/485 TO WIFI ETH (B) Serial to Ethernet/Wi-Fi Gateway Firmware V3.1.1.0: HW 4.3.2.1: Webpage V7.04T.07.002880.0301 allows attackers to set the Administrator password and username as blank values, allowing attackers to bypass authentication.

Earlier versions of this analysis (1)

v1 Mar 15, 2026 - 16:35 CVSS 9.8

RemediationAI

Implement robust authentication mechanisms. Use multi-factor authentication. Review authentication logic for bypass conditions. Remove default credentials.

Affected VersionsENISA

n/a n/a

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

An authentication bypass vulnerability allows attackers to circumvent login mechanisms and gain unauthorized access without valid credentials.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 9.8 CRITICAL

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

High

Integrity

High

Availability

High

Lifecycle Timeline

PoC Detected

Dec 15, 2025 - 15:37 vuln.today

Public exploit code

CVE Published

Dec 04, 2025 - 19:16 nvd

CRITICAL 9.8

Executive ViewAI

Why It Matters

A critical vulnerability in Waveshare RS232/485 to WiFi/Ethernet gateways allows attackers to completely bypass authentication by setting administrator credentials to blank values, potentially giving unauthorized access to network infrastructure and connected systems. Any organization deploying these devices faces immediate risk of unauthorized device control, network compromise, and potential lateral movement into connected systems.

Business Impact: Severe

Compensating Controls

Network segmentation—restrict device access to isolated VLANs; disable remote management and web interface if not actively required; implement strict firewall rules allowing administrative access only from specific trusted IP addresses; deploy network monitoring/IDS to detect unauthorized access attempts; consider disabling the affected gateway devices entirely until patched; implement multi-factor authentication at network perimeter for any systems that interact with these devices.

Threat Intelligence Overview

EPSS Score

0.2%

Top 61% exploitable

Exploit

POC

Public exploit code exists

Data Quality

4 sources

Confidence: Medium

EUVD

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 Yes

EPSS 0.2%

Patch available No

Active threat No

Deciding rule

CRITICAL severity + public POC available

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.