Description

Missing authentication for critical function vulnerability in Baylan Measuring Instruments Industry and Trade Inc. Baylan Smart Meter Management Application (BMS) allows Authentication Bypass. This issue affects Baylan Smart Meter Management Application (BMS): before v1.1.10.142.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "9.8",
  "pubDate": "2026-08-20T14:17:09.617Z",
  "pubdate": "2026-08-20T14:17:09.617Z",
  "executiveSummary": "A missing authentication for critical function vulnerability has been identified in the Baylan Measuring Instruments Industry and Trade Inc. Baylan Smart Meter Management Application (BMS). This flaw permits an unauthorized remote attacker to achieve an Authentication Bypass, effectively circumventing security controls designed to restrict access to sensitive application functionality.\nThe vulnerability specifically impacts the Baylan Smart Meter Management Application (BMS) for all software versions prior to v1.1.10.142. Successful exploitation of this security defect allows malicious actors to interact directly with critical backend functions without supplying valid credentials, leading to potential unauthorized control, configuration tampering, and data exposure within smart meter management infrastructures.\nThe risk implications are severe, as compromising smart meter management software can lead to widespread utility disruption, unauthorized manipulation of metering devices, and loss of confidentiality and integrity regarding telemetry and operational data. The attack capabilities require network accessibility to the vulnerable BMS instance, but no prior authentication or administrative privileges are required to initiate the exploit.\nOrganizations operating affected deployments must prioritize remediation by updating the software to the patched version or implementing strict network segmentation and access controls to mitigate exposure until updates can be successfully applied.",
  "technicalDetails": "The root cause of the vulnerability stems from missing authentication enforcement mechanisms for critical functions within the Baylan Smart Meter Management Application (BMS). Specifically, certain sensitive API endpoints, administrative routes, or operational methods fail to validate the session state or credentials of incoming requests before executing the underlying business logic.\nThe affected product is the Baylan Smart Meter Management Application (BMS) in versions prior to v1.1.10.142. The vulnerable component involves the application's access control architecture, which improperly handles incoming HTTP requests or network protocol communications by assuming internal invocation or omitting necessary authorization checks.\nExploitation of this vulnerability requires network exposure to the vulnerable BMS application instance. Because the application lacks proper authentication checks on critical functions, an unauthenticated attacker can directly craft and transmit malicious requests targeting these sensitive endpoints. The attack flow generally proceeds as follows: First, the attacker identifies or enumerates the exposed critical functions within the BMS application. Second, the attacker formulates a targeted request payload directed at the unprotected functional endpoints, omitting any authentication tokens or credentials. Third, upon receiving the request, the BMS application processes the execution flow of the critical function without verifying the caller's identity or authorization level. Finally, the application executes the requested operation, granting the attacker unauthorized access to administrative capabilities, sensitive data reads, or unauthorized state modifications.\nThe privilege requirements for this exploit are nonexistent, as the vulnerability explicitly allows anonymous or unauthenticated users to perform actions restricted to legitimate operators or administrators. The network exposure is typically remote, assuming the BMS service is accessible via local area networks, wide area networks, or the internet depending on deployment topology.\nThe post-exploitation impact includes full administrative compromise of the Baylan Smart Meter Management Application (BMS), unauthorized manipulation of connected smart meters, potential disruption of utility services, and unauthorized access to sensitive operational telemetry. Attackers may leverage this access to persist within the infrastructure or pivot to other connected utility management systems."
}