# CVE-2026-15706: Missing Authentication for Critical Function in Management API in Baylan Water Meters's BMS

> Attackers can bypass authentication to access critical functions in the Baylan Smart Meter Management Application, requiring an upgrade to secure the system.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 20 Aug 2026
- **Updated:** 24 Aug 2026
- **Also known as:** GHSA-v77m-pgr8-9w4g

## What is CVE-2026-15706?

CVE-2026-15706 is a critical missing authorization vulnerability in Baylan Smart Meter Management Application (BMS), published on 20 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

Weakness: CWE-306 (Missing Authentication for Critical Functionality)

## Which versions are affected by CVE-2026-15706?


## How do I fix CVE-2026-15706?

No fix has been published for CVE-2026-15706 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-15706 being exploited?

There is no known exploitation of CVE-2026-15706 in the wild and no public exploit code.

Public exploit code:

- will be published (github_poc): https://github.com/musana/CVE-2026-15706

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-15706 and fix it if it is affected.

What it is: CVE-2026-15706 is a critical missing authorization vulnerability in Baylan Smart Meter Management Application (BMS), published on 20 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-15706 in the wild and no public exploit code.

Affected product: Baylan Smart Meter Management Application (BMS). No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-15706/ (Markdown: https://insights.sbomify.com/CVE-2026-15706/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-15706
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-15706
- OSV: https://osv.dev/vulnerability/CVE-2026-15706

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-15706/
Summaries are generated and may contain mistakes; the official description above is the record.