CVE intelligence and bounded remediation

CVE-2021-33045 — Dahua IP Camera Authentication Bypass Vulnerability

Critical CVSS 9.8 CISA KEV

The identity authentication bypass vulnerability found in some Dahua products during the login process. Attackers can bypass device identity authentication by constructing malicious data packets.

Severity
Critical
CVSS
9.8 (3.1)
Published
2021-09-15
CISA KEV
Known exploited
Ecosystem
operating-system
Weaknesses
CWE-287

Affected products

  • dahuasecurity / ipc-hum7xxx_firmware
  • dahuasecurity / ipc-hx3xxx_firmware
  • dahuasecurity / ipc-hx5xxx_firmware
  • dahuasecurity / nvr-1xxx_firmware
  • dahuasecurity / nvr-2xxx_firmware
  • dahuasecurity / nvr-4xxx_firmware

Showing 6 representative product identities from 19 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Authentication bypass and missing authentication

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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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