CVE-2021-47706Public exploitNetwork attack vector

Unauthenticated SQL backup access via forged cookies

Published Dec 9, 2025 · Updated Apr 7, 2026

Authentication bypass in COMMAX Biometric Access Control System 1.0.0 allows remote attackers to read SQL backup listings through forged cookies. The /db_dump.php handler accepts attacker-chosen CMX_ADMIN_ID, CMX_ADMIN_LV, and related CMX cookie values as proof of an administrator session without validating their integrity. No credentials or user interaction are required; the demonstrated request exposes available database backups, while the CNA also reports bypass of physical controls.

CVSS severity8.7
High
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in COMMAX Biometric Access Control System 1.0.0 allows remote attackers to read SQL backup listings through forged cookies. The /db_dump.php handler accepts attacker-chosen CMX_ADMIN_ID, CMX_ADMIN_LV, and related CMX cookie values as proof of an administrator session without validating their integrity. No credentials or user interaction are required; the demonstrated request exposes available database backups, while the CNA also reports bypass of physical controls.

The record

CVE
CVE-2021-47706
Published
Dec 9, 2025
Updated
Apr 7, 2026
Vendor
COMMAX
Product
COMMAX Biometric Access Control System
Classifications
CWE-565, T1550.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 9, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 7, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

COMMAX · COMMAX Biometric Access Control Systemversion=1.0.0

Published CVSS scores

8.7VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-565Reliance on Cookies without Validation and Integrity Checking
T1550.004Use Alternate Authentication Material: Web Session Cookie

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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