Cyber Resilience

CVE-2025-63364

Waveshare Rs232\/485 To Wifi Eth \(B\) Firmware 3.1.1.0

Public PoC
Published
04 December 2025
Modified
16 December 2025
Patch / advisory
View advisory
CVSS Score v3.1 7.5
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS Score 0.0024 15th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2025-63364 is a high-severity Cleartext Transmission of Sensitive Information (CWE-319) vulnerability in Waveshare Rs232\/485 To Wifi Eth \(B\) Firmware. Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Credentials In Files (T1552.001); ranked at the 15th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

The strongest mitigations our analysis identified map to IA-5 (Authenticator Management) and SC-8 (Transmission Confidentiality and Integrity) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

A04:2025 Cryptographic Failures

EU & UK References

Vulnerability Data

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 was discovered to transmit Administrator credentials in plaintext.

CWE(s)
CWE-319

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1552.001 Credentials In Files Credential Access
Adversaries may search local file systems and remote file shares for files containing insecurely stored credentials.
attack.mitre.org →
T1040 Network Sniffing Credential Access
Adversaries may passively sniff network traffic to capture information about an environment, including authentication material passed over the network.
attack.mitre.org →
Why these techniques?

Plaintext credential transmission over the network directly enables credential capture via network sniffing (T1040) and retrieval of credentials from unsecured network traffic (T1552.001).

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

CVEs Like This One

CVE-2025-63361Same product: Waveshare Rs232\/485 To Wifi Eth \(B\)
CVE-2025-63362Same product: Waveshare Rs232\/485 To Wifi Eth \(B\)
CVE-2025-63363Same product: Waveshare Rs232\/485 To Wifi Eth \(B\)
CVE-2025-44612Shared CWE-319
CVE-2024-42181Shared CWE-319
CVE-2026-9741Shared CWE-319
CVE-2024-36558Shared CWE-319
CVE-2026-22155Shared CWE-319
CVE-2026-2539Shared CWE-319
CVE-2024-44276Shared CWE-319

Affected Assets

waveshare
rs232\/485 to wifi eth \(b\) firmware
3.1.1.0

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)
  • SC-8 Transmission Confidentiality and Integrity
  • IA-5 Authenticator Management
  • AC-17 Remote Access
Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)

—

Validate
Prove the fix (OWASP ASVS)

—

Mitigating Controls (NIST 800-53 r5) AI

SC-8 Transmission Confidentiality and Integrity good match
prevent

Directly requires cryptographic confidentiality and integrity for transmitted data, eliminating plaintext credential exposure.

IA-5 Authenticator Management good match
prevent

Mandates secure management and transmission of authenticators so passwords are never sent in cleartext.

AC-17 Remote Access partial match
prevent

Requires encryption mechanisms for all remote access sessions that carry administrative credentials.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.DS-02 full match
prevents

Encryption of data-in-transit directly prevents cleartext transmission while the control also addresses integrity and availability.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.21 Security of network services mostly match
prevents

Specifying encryption and other security technology for network services prevents transmission of sensitive information in cleartext over potentially untrusted channels.

A.5.14 Information transfer partial match
prevents

Mandating cryptographic protection and stronger authentication on public networks stops the transmission of plaintext sensitive information.

A.6.7 Remote working partial match
mitigates

Specifying communications-security requirements and secure remote-access methods (including encryption expectations) prevents the transmission of sensitive data in cleartext over home or public networks.

A.7.12 Cabling security partial match
mitigates

Armoured conduits, electromagnetic shielding and locked enclosures make passive eavesdropping on unencrypted traffic traversing the cables more difficult, mitigating exposure of sensitive data in transit.

References