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VulnerabilityPublished

CVE-2026-1633: Synectix LAN 232 TRIO · Missing Authentication

Affects Synectix LAN 232 TRIOSource CVE Database V5

0

Not known to be exploited · CVSS 10.0 Critical.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 3.1 base score
10.0Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.6% chance of exploitation in 30 days – higher than 48% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 3 Feb 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
SynectixLAN 232 TRIOAffected
  • =All versions
Fixed in–

AI-suggested

Since no patches are currently available, European organizations should implement immediate compensating controls. First, isolate the LAN 232 TRIO devices on dedicated management VLANs or physically separate networks inaccessible from general enterprise or internet-facing networks. Employ strict network access controls such as firewall rules or ACLs to restrict access to the device’s management interface only to trusted administrators. Deploy network monitoring and intrusion detection systems to detect anomalous access attempts or configuration changes. Where possible, replace or upgrade affected devices with models that support authentication and secure management protocols. Additionally, enforce strong physical security controls to prevent local tampering. Document and regularly audit device configurations to quickly identify unauthorized changes. Finally, engage with Synectix for updates on patches or firmware upgrades and plan for timely deployment once available.

Description

CVE-2026-1633 is a critical vulnerability in the Synectix LAN 232 TRIO 3-Port serial to Ethernet adapter, where its web management interface lacks any authentication. This allows unauthenticated attackers to access and modify critical device settings or perform a factory reset remotely. The vulnerability affects all versions of the product and has a CVSS score of 10.0, indicating maximum severity with full impact on confidentiality, integrity, and availability without requiring any privileges or user interaction. Although no known exploits are currently reported in the wild, the risk is significant due to the device's role in network infrastructure. European organizations using this device in industrial or network environments face potential operational disruption and security breaches. Mitigation requires isolating the device from untrusted networks, implementing network-level access controls, and monitoring for unauthorized access. Countries with higher industrial automation adoption and Synectix product usage, such as Germany, France, and the UK, are most at risk. Immediate attention is necessary to prevent exploitation and ensure network security.

References

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