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Vulnerabilities

Vulnerability · CVE-2021-33044

Dahua IP Camera Authentication Bypass Vulnerability

Published Sep 15, 2021 · catalog updated Jun 16, 2026 · Dahua IP Camera Firmware

Patch now

CVE-2021-33044 is in the CISA known-exploited catalog, due Sep 11, 2024. Confirm Dahua IP Camera Firmware against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
Severity
Critical9.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
99.99%
Remediation
Remediation guidance
Affected products
cpe dahuasecurity/ipc-hum7xxx firmware · cpe dahuasecurity/ipc-hx3xxx firmware · cpe dahuasecurity/ipc-hx5xxx firmware · cpe dahuasecurity/sd1a1 firmware · cpe dahuasecurity/sd22 firmware · cpe dahuasecurity/sd49 firmware

Dahua IP cameras and related products contain an authentication bypass vulnerability when the NetKeyboard type argument is specified by the client during authentication. Initial-access exploit intelligence.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe dahuasecurity/ipc-hum7xxx firmwareversion unspecified
  • cpe dahuasecurity/ipc-hx3xxx firmwareversion unspecified
  • cpe dahuasecurity/ipc-hx5xxx firmwareversion unspecified
  • cpe dahuasecurity/sd1a1 firmwareversion unspecified
  • cpe dahuasecurity/sd22 firmwareversion unspecified
  • cpe dahuasecurity/sd49 firmwareversion unspecified
  • cpe dahuasecurity/sd50 firmwareversion unspecified
  • cpe dahuasecurity/sd52c firmwareversion unspecified
  • cpe dahuasecurity/sd6al firmwareversion unspecified
  • cpe dahuasecurity/tpc-bf1241 firmwareversion unspecified
  • cpe dahuasecurity/tpc-bf2221 firmwareversion unspecified
  • cpe dahuasecurity/tpc-bf5x01 firmwareversion unspecified
  • vendor Dahua IP Camera Firmwareversion unspecified

How to fix CVE-2021-33044

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2021-33044 is in the CISA known-exploited catalog, due Sep 11, 2024. Confirm Dahua IP Camera Firmware against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

What should an analyst verify?

CWE-287: Improper Authentication. EPSS 99.99%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 15, 2021 · Catalog

    Detected

    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.

  2. Aug 21, 2024 · CISA KEV

    Known exploited

    Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

  3. Sep 11, 2024 · CISA KEV

    Remediation due

    Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

  4. Jun 16, 2026 · Catalog

    Updated

    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.

Sources

  • CISA KEVConfirmed exploitationCVE-2021-33044

    Dahua IP cameras and related products contain an authentication bypass vulnerability when the NetKeyboard type argument is specified by the client during authentication.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2021-33044

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2021-33044

    30-day exploitation probability 100.0%

    first.org
  • NIST NVDVulnerability recordCVE-2021-33044

    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.

    nvd.nist.gov
  • Packet Storm SecurityCited referencehttp://packetstormsecurity.com/files/164423/Dahua-Authentication-Bypass.html

    Packet Storm link already published on the finding.

    packetstormsecurity.com
  • VulnCheck KEVConfirmed exploitationCVE-2021-33044

    Dahua IP cameras and related products contain an authentication bypass vulnerability when the NetKeyboard type argument is specified by the client during authentication.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.