BACK TO NEWS
CERT AdvisoriesLow

Critical Authentication Bypass Flaws in ZLAN5143D Industrial Device (ICSA-26-041-02)

2 min readSource: CISA Cybersecurity Advisories

CISA warns of severe vulnerabilities in ZLAN Information Technology Co.'s ZLAN5143D device, enabling authentication bypass and password reset attacks.

Critical Vulnerabilities Discovered in ZLAN5143D Industrial Device

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has issued an advisory (ICSA-26-041-02) detailing critical vulnerabilities in ZLAN Information Technology Co.'s ZLAN5143D industrial device. Successful exploitation of these flaws could allow threat actors to bypass authentication or reset device passwords, compromising operational security in industrial environments.

Technical Details

The advisory identifies the following affected versions:

  • ZLAN5143D (all versions prior to patched releases)

While CISA has not disclosed specific CVE IDs in the public advisory, the vulnerabilities are classified as high-severity due to their potential impact on authentication mechanisms. The Common Security Advisory Framework (CSAF) document linked in the advisory provides additional technical context for security teams.

Impact Analysis

Exploitation of these vulnerabilities could enable attackers to:

  • Gain unauthorized access to industrial control systems (ICS) without valid credentials
  • Reset device passwords, potentially locking out legitimate administrators
  • Disrupt operations in critical infrastructure sectors relying on ZLAN5143D devices

The authentication bypass flaw is particularly concerning for organizations using the device in OT (Operational Technology) environments, where unauthorized access could lead to physical consequences.

Recommendations

CISA urges affected organizations to:

  1. Review the CSAF document for detailed vulnerability information: CSAF JSON File
  2. Apply vendor-provided patches immediately when available
  3. Implement network segmentation to isolate ZLAN5143D devices from corporate networks
  4. Monitor for unusual authentication attempts or password reset activities
  5. Restrict physical access to vulnerable devices

Security teams should prioritize remediation given the high-risk nature of authentication bypass vulnerabilities in industrial equipment. Additional mitigation strategies may be found in CISA's ICS-CERT recommendations.

Share

TwitterLinkedIn