What is the CVSS score of CVE-2026-1633?

CVE-2026-1633 has a CVSS 3.1 base score of 10.0 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of IoT are affected by CVE-2026-1633?

Critical vulnerability in Synectix LAN 232 TRIO serial-to-ethernet adapters allows any network user to remotely modify device settings or perform factory resets without authentication, potentially…

How to fix or mitigate CVE-2026-1633?

Within 24 hours: Identify all Synectix LAN 232 TRIO devices in your network and isolate them to restricted management VLANs with access controls. Within 7 days: Implement network segmentation, restrict web management interface access via firewall rules to authorized administrators only, and disable remote management if not operationally required. Within 30 days: Monitor for vendor security updates and develop a plan for device replacement or firmware patching once available; document all affected devices and their operational criticality.

IoT CVE-2026-1633

CRITICAL

Missing Authentication for Critical Function (CWE-306)

2026-02-04 ics-cert@hq.dhs.gov

IoT Authentication Bypass

10.0

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

10.0 CRITICAL

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

CVE Published

Feb 04, 2026 - 00:16 nvd

CRITICAL 10.0

DescriptionCVE.org

The Synectix LAN 232 TRIO 3-Port serial to ethernet adapter exposes its web management interface without requiring authentication, allowing unauthenticated users to modify critical device settings or factory reset the device.

AnalysisAI

Synectix LAN 232 TRIO serial-to-ethernet adapter exposes its web management interface without authentication (CVSS 10.0), enabling unauthenticated control of serial devices.

Technical ContextAI

The Synectix LAN 232 TRIO 3-port serial-to-ethernet adapter has a CWE-306 missing authentication on its web management interface, allowing complete unauthenticated control.