CVE intelligence and bounded remediation

CVE-2023-53967 — Dbbroadcast Sft Dab 600/C Firmware security vulnerability

Critical CVSS 9.3

Screen SFT DAB 600/C firmware 1.9.3 contains an authentication bypass vulnerability that allows attackers to change the admin password without requiring the current credentials. Attackers can exploit the userManager.cgx API endpoint by sending a crafted POST request with a new MD5-hashed password to directly modify the admin account's authentication.

Severity
Critical
CVSS
9.3 (4.0)
Published
2025-12-22
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-306

Affected products

  • dbbroadcast / sft_dab_600/c_firmware / 1.9.3

Matched remediation archetype

Authentication bypass and missing authentication

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Map every affected endpoint and protocol path, including alternate ports, legacy routes, recovery flows, service accounts, and machine-to-machine access.
  • Confirm which deployments enable the affected authentication mode and whether the interface is reachable from untrusted networks.
  • Review session, token, credential, and proxy trust configuration without attempting account takeover.

Remediate safely

  • Apply the supported fix and centralize fail-closed authentication before protected request handling.
  • Remove default or embedded credentials, rotate affected secrets and sessions, and bind authentication decisions to the intended audience and channel.
  • Add negative tests for alternate routes, malformed or absent credentials, recovery flows, and proxy-derived identity.

Authoritative sources

Complete CVE record and remediation plan

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