---
id: CVE-2026-71809
title: >-
  Authentication Bypass via Hardcoded Master Verification Code vulnerability in
  Siam Ordering (siam-server) 1.0.0 allows remote unauthenticated attackers to
  log in as any user, merchant, or administrator.
summary: >-
  Authentication Bypass via Hardcoded Master Verification Code vulnerability in
  Siam Ordering (siam-server) 1.0.0 allows remote unauthenticated attackers to
  log in as any user, merchant, or administrator.
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-259
published: '2026-09-09'
updated: '2026-09-14'
sourceUpdated: '2026-09-14T15:17:07.133'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-71809'
references:
  - url: 'https://github.com/W000i/vuln/issues/11'
    label: cve@mitre.org
  - url: 'https://github.com/W000i/vuln/issues/11'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-14T14:03:46.611471Z'
epss: 0.00355
epssPercentile: 0.29346
ingestedAt: '2026-09-14T15:23:07.420Z'
---

## Overview

Authentication Bypass via Hardcoded Master Verification Code vulnerability in Siam Ordering (siam-server) 1.0.0 allows remote unauthenticated attackers to log in as any user, merchant, or administrator.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.