CASCACascade Atlas

Evidence dossier

CVE-2021-33045

CVE-2021-33045

84.5–100.0Priority evidence range
As known Jul 19, 2026, 5:00 AM UTCgen-56ccdaf9

Normalized restatement

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.

State
PUBLISHED
Published
Sep 15, 2021
Updated
Jan 12, 2026
Evidence coverage
72%
CISA KEVCatalog member

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

FIRST EPSS99.56%

2026-07-18 · v2026.06.15 · percentile 99.9%

Source stateConflict visible

Distinct CVSS assessments remain side by side; none are averaged.

Source comparison

Who said what

CISA-ADPindependent enrichment
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CISA ADP Vulnrichment

CVEderivative copy
container

CVE Program Container

dahuaoriginal assertion
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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.

CISA KEVoriginal assertion
observed_exploitation

Dahua IP Camera Authentication Bypass Vulnerability

FIRST EPSSoriginal assertion
model_probability

Probability 0.995560000000; percentile 0.999420000000

Applicability

Cited product scope

Trace impact →
n/aSome Dahua IP Camera, Video Intercom, NVR, XVR devices
[{"status": "affected", "version": "Dahua IP Camera devices IPC-HX3XXX, IPC-HX5XXX, and IPC-HUM7XXX Buildtime before May, 2020, Video Intercom devices VTO75X95X, VTO65XXX, and VTH542XH, NVR devices NVR1XXX, NVR2XXX, NVR5XXX, and NVR6XX, XVR devices XVR4xxx, XVR5xxx, and XVR7xxx Buildtime before December, 2019."}]unknown
Unknown vendorUnknown product
cpe:2.3:h:dahuasecurity:ipc-hum7xxx:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:dahuasecurity:ipc-hx3xxx:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:dahuasecurity:ipc-hx5xxx:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:dahuasecurity:nvr-1xxx:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:dahuasecurity:nvr-2xxx:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:dahuasecurity:nvr-4xxx:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:dahuasecurity:nvr-5xxx:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:dahuasecurity:nvr-6xx:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:dahuasecurity:vth-542xh:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:dahuasecurity:vto-65xxx:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:dahuasecurity:vto-75x95x:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:dahuasecurity:xvr-4x04:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:dahuasecurity:xvr-4x04:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:dahuasecurity:xvr-4x08:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:dahuasecurity:xvr-5x04:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:dahuasecurity:xvr-5x08:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:dahuasecurity:xvr-5x16:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:dahuasecurity:xvr-7x16:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:h:dahuasecurity:xvr-7x32:-:*:*:*:*:*:*:*constrained
Unknown vendorUnknown product
cpe:2.3:o:dahuasecurity:ipc-hum7xxx_firmware:*:*:*:*:*:*:*:*; end excluding 2.820.0000000.5.r.210705supported
Unknown vendorUnknown product
cpe:2.3:o:dahuasecurity:ipc-hx3xxx_firmware:*:*:*:*:*:*:*:*; end excluding 2.800.0000000.29.r.210630supported
Unknown vendorUnknown product
cpe:2.3:o:dahuasecurity:ipc-hx5xxx_firmware:*:*:*:*:*:*:*:*; end excluding 2.820.0000000.5.r.210705supported
Unknown vendorUnknown product
cpe:2.3:o:dahuasecurity:nvr-1xxx_firmware:*:*:*:*:*:*:*:*; end excluding 4.001.0000005.1.r.210709supported
Unknown vendorUnknown product
cpe:2.3:o:dahuasecurity:nvr-2xxx_firmware:*:*:*:*:*:*:*:*; end excluding 4.001.0000000.1.r.210710supported
Unknown vendorUnknown product
cpe:2.3:o:dahuasecurity:nvr-4xxx_firmware:*:*:*:*:*:*:*:*; end excluding 4.001.0000005.1.r.210713supported
Unknown vendorUnknown product
cpe:2.3:o:dahuasecurity:nvr-5xxx_firmware:*:*:*:*:*:*:*:*; end excluding 4.001.0000000.0.r.210710supported
Unknown vendorUnknown product
cpe:2.3:o:dahuasecurity:nvr-6xx_firmware:*:*:*:*:*:*:*:*; end excluding 4.001.0000001.1.r.210716supported
Unknown vendorUnknown product
cpe:2.3:o:dahuasecurity:vth-542xh_firmware:*:*:*:*:*:*:*:*; end excluding 4.500.0000002.0.r.210715supported
Unknown vendorUnknown product
cpe:2.3:o:dahuasecurity:vto-65xxx_firmware:*:*:*:*:*:*:*:*; end excluding 4.300.0000004.0.r.210715supported
Unknown vendorUnknown product
cpe:2.3:o:dahuasecurity:vto-75x95x_firmware:*:*:*:*:*:*:*:*; end excluding 4.300.0000003.0.r.210714supported
Unknown vendorUnknown product
cpe:2.3:o:dahuasecurity:xvr-4x04_firmware:*:*:*:*:*:*:*:*; end excluding 4.001.0000001.1.r.210709supported
Unknown vendorUnknown product
cpe:2.3:o:dahuasecurity:xvr-4x04_firmware:-:*:*:*:*:*:*:*supported
Unknown vendorUnknown product
cpe:2.3:o:dahuasecurity:xvr-4x08_firmware:*:*:*:*:*:*:*:*; end excluding 4.001.0000001.1.r.210709supported
Unknown vendorUnknown product
cpe:2.3:o:dahuasecurity:xvr-5x04_firmware:*:*:*:*:*:*:*:*; end excluding 4.001.0000003.1.r.210710supported
Unknown vendorUnknown product
cpe:2.3:o:dahuasecurity:xvr-5x08_firmware:*:*:*:*:*:*:*:*; end excluding 4.001.0000003.1.r.210710supported
Unknown vendorUnknown product
cpe:2.3:o:dahuasecurity:xvr-5x16_firmware:*:*:*:*:*:*:*:*; end excluding 4.001.0000003.1.r.210710supported
Unknown vendorUnknown product
cpe:2.3:o:dahuasecurity:xvr-7x16_firmware:*:*:*:*:*:*:*:*; end excluding 4.001.0000003.1.r.210710supported
Unknown vendorUnknown product
cpe:2.3:o:dahuasecurity:xvr-7x32_firmware:*:*:*:*:*:*:*:*; end excluding 4.001.0000003.1.r.210710supported

Assessments

CVSS by origin

9.8
nvd@nist.govCVSS 3.1 · role PrimaryCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10.0
nvd@nist.govCVSS 2.0 · role PrimaryAV:N/AC:L/Au:N/C:C/I:C/A:C
9.8
134c704f-9b21-4f2e-91b3-4a467353bcc0CVSS 3.1 · role SecondaryCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8
CISA-ADPCVSS 3.1 · role unknownCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Limitations and unknowns

  • KEV membership is authoritative for the catalog, not proof of exposure in any environment.
  • EPSS is a dated model probability and not an individual-environment prediction.
  • Affected or fixed status applies only to the exact cited product and version scope; unresolved scope remains unknown.
  • NVD-carried upstream facts remain derivative and are not independent corroboration.
  • Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
  • NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
  • Factor D is unknown in Public Core because no accepted canonical mapping-obligation ledger is present.
  • Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.