CVE intelligence and bounded remediation

CVE-2021-27444 — Weintek Cmt-Svr-100 Firmware security vulnerability

Critical CVSS 9.8

The Weintek cMT product line is vulnerable to various improper access controls, which may allow an unauthenticated attacker to remotely access and download sensitive information and perform administrative actions on behalf of a legitimate administrator.

Severity
Critical
CVSS
9.8 (3.1)
Published
2022-05-16
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-284

Affected products

  • weintek / cmt-svr-100_firmware
  • weintek / cmt-svr-102_firmware
  • weintek / cmt-svr-200_firmware
  • weintek / cmt-svr-202_firmware
  • weintek / cmt-g01_firmware
  • weintek / cmt-g02_firmware

Showing 6 representative product identities from 16 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Authorization bypass, IDOR, and cross-tenant access

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Check exposure

  • Map object and action authorization checks across API, UI, batch, import/export, and background-job paths.
  • Identify tenant, ownership, role, and policy boundaries for affected resources and administrative operations.
  • Use synthetic fixtures to compare intended access matrices without accessing another user's real data.

Remediate safely

  • Enforce server-side authorization at each resource access and state transition using the authenticated principal and trusted tenant context.
  • Scope data queries by tenant and ownership; treat client-supplied identifiers, roles, and policy claims as untrusted.
  • Add deny-by-default policy tests for horizontal and vertical access across every affected transport.

Authoritative sources

Complete CVE record and remediation plan

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