cbcvebase.
CVE-2026-1633
published 2026-02-04

CVE-2026-1633: The Synectix LAN 232 TRIO 3-Port serial to ethernet adapter exposes its web management interface without requiring authentication, allowing unauthenticated…

PriorityP268critical10CVSS 3.1
AVNACLPRNUINSCCHIHAH
EPSS
0.55%
41.8th percentile
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.

Affected

1 ranges
VendorProductVersion rangeFixed in
synectixlan_232_trio——

Detection & IOCsextracted from sources · hover to see the quote

  • →The Synectix LAN 232 TRIO web management interface is exposed without authentication — detect unauthenticated HTTP requests to the device's management interface from unexpected or external sources ↗
  • →All firmware versions of Synectix LAN 232 TRIO are affected (vers:all/*) — any observed device of this model should be treated as vulnerable regardless of firmware version ↗
  • →Network-accessible (AV:N), no privileges required (PR:N), no user interaction (UI:N) — monitor for unauthenticated HTTP configuration or reset requests to serial-to-ethernet adapter management interfaces on the network ↗
  • ·The vendor (Synectix) is no longer in business; no firmware fix, mitigation, or update will ever be available — all deployed devices must be treated as permanently unpatched ↗
  • ·Every version of the LAN 232 TRIO is affected with no exceptions — there is no safe firmware version to target in detection scope filtering ↗
  • ·No known public exploitation has been reported to CISA at time of advisory publication, but the CVSS score is 10.0 CRITICAL with network-reachable, zero-interaction attack vector ↗

CVSS provenance

nvdv3.110.0CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
nvdv4.010.0CRITICALCVSS: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:X/V:X/RE:X/U:X
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