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Vulnerability record · CVE-2026-1633 · published 4 February 2026

CVE-2026-1633: Missing authentication for critical function vulnerability

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.

10.0 CVSS 4.0 Critical EPSS 0.57% · top 54.9% CWE-306 · Missing authentication for critical function Deferred
10.0CVSS 4.0 base score
0.57%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-034-04.json
https://www.cisa.gov/news-events/ics-advisories/icsa-26-034-04

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Source: NIST National Vulnerability Database (record CVE-2026-1633), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.