CVE-2026-15706

Missing Authentication for Critical Function in Management API in Baylan Water Meters's BMS

Published Aug 20, 2026 CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed

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.

Analysis

Technical impact

The vulnerability is a missing authentication flaw that allows unauthenticated users to access a critical management API in the Baylan Smart Meter Management Application. The flaw enables an attacker to bypass authentication checks and execute privileged operations via the API, representing a severe authorization weakness (CWE-306).

Affected Systems

Baylan Measuring Instruments Industry and Trade Inc. Baylan Smart Meter Management Application (BMS) before version 1.1.10.142 is affected. Users of earlier versions are at risk if the management API is exposed to untrusted networks.

Risk and Exploitability

The CVSS score of 9.8 indicates high severity. The EPSS score is not available, and the vulnerability is not listed in the CISA KEV catalog. The likely attack vector is an unauthenticated, remote request to the exposed API, assuming the system is reachable over a network. An attacker could gain unauthorized control over meter management functions without needing any credentials.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Baylan Measuring Instruments Industry and Trade Inc.

Baylan Smart Meter Management Application (BMS)

unaffected

Version	Status	Constraints
`0`	affected	< v1.1.10.142

No data.

Vendor Product Versions

Baylan Measuring Instruments Industry And Trade Inc.

Baylan Smart Meter Management Application (bms)

Version	Status	Scheme	Platform
`[0,v1.1.10.142)`	affected	generic	—

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

Upgrade Baylan Smart Meter Management Application to version 1.1.10.142 or later, which resolves the authentication bypass.
If upgrading immediately is not feasible, restrict network access to the management API by firewall or change the interface to be only accessible from a trusted subnet.
Apply any vendor‑issued configuration recommendations that enforce authentication on the API endpoints, such as requiring TLS or client certificates.

Generated by OpenCVE AI on August 20, 2026 at 19:58 UTC.

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.643% probability within 30 days)

Exploitation none

Automatable yes

Technical Impact total

References

Link	Providers
https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-0881

History

Aug 21, 2026 12:30 PM First appearance in the feed. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Baylan Measuring Instruments Industry And Trade Inc. Baylan Measuring Instruments Industry And Trade Inc. baylan Smart Meter Management Application (bms)
Vendors & Products		Baylan Measuring Instruments Industry And Trade Inc. Baylan Measuring Instruments Industry And Trade Inc. baylan Smart Meter Management Application (bms)

Aug 20, 2026 5:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Aug 20, 2026 1:30 PM Description updated. Title updated. Weaknesses updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
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.
Title		Missing Authentication for Critical Function in Management API in Baylan Water Meters's BMS
Weaknesses		CWE-306
References		https://siberguvenlik.gov.tr/guvenlik-bildirimleri/detay/tr-26-0881
Metrics		cvssV3_1 `{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}`