CISA KEV · Known exploitedCritical

CVE-2021-33045

Dahua IP Camera Firmware

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.

CVSS
9.8
EPSS
99.6%
99.9% percentile
CISA KEV
Listed
Published
2021.09.16
PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV
Exploit probability99.6%
Technical severityCVSS 9.8

Vulnerability overview

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.

Affected product and versions

Product
Dahua IP Camera Firmware
Affected versions
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., < 2.820.0000000.5.r.210705, < 2.800.0000000.29.r.210630, < 4.001.0000005.1.r.210709, < 4.001.0000000.1.r.210710, < 4.001.0000005.1.r.210713, < 4.001.0000000.0.r.210710, < 4.001.0000001.1.r.210716, < 4.500.0000002.0.r.210715, < 4.300.0000004.0.r.210715, < 4.300.0000003.0.r.210714, < 4.001.0000001.1.r.210709, < 4.001.0000003.1.r.210710
Fixed versions
2.820.0000000.5.r.210705, 2.800.0000000.29.r.210630, 4.001.0000005.1.r.210709, 4.001.0000000.1.r.210710, 4.001.0000005.1.r.210713, 4.001.0000000.0.r.210710, 4.001.0000001.1.r.210716, 4.500.0000002.0.r.210715, 4.300.0000004.0.r.210715, 4.300.0000003.0.r.210714, 4.001.0000001.1.r.210709, 4.001.0000003.1.r.210710

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
CISA required action

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

Due date: 2024.09.11
  1. 1
    Identify

    Confirm that Dahua IP Camera Firmware and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-287
KEV added
2024.08.21
Ransomware use
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