Home/CVE/Dahua IP Camera Authentication Bypass Vulnerability
CVE

CVE-2021-33045

Dahua IP Camera Authentication Bypass Vulnerability

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.

CRITICAL · CVSS 9.8 ⚠ CISA KEV EPSS 0.94171
Act now
  • Listed on CISA KEV (known exploited in the wild)
  • SSVC exploitation status: active
  • EPSS ≥ 0.50 - high probability of exploitation in the next 30 days
  • EPSS percentile: top 0% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0

Required Remediation

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

Weakness Classification

Affected Products & Versions

19
dahuasecurity ipc-hum7xxx firmware< 2.820.0000000.5.r.210705
dahuasecurity ipc-hx3xxx firmware< 2.800.0000000.29.r.210630
dahuasecurity ipc-hx5xxx firmware< 2.820.0000000.5.r.210705
dahuasecurity nvr-1xxx firmware< 4.001.0000005.1.r.210709
dahuasecurity nvr-2xxx firmware< 4.001.0000000.1.r.210710
dahuasecurity nvr-4xxx firmware< 4.001.0000005.1.r.210713
dahuasecurity nvr-5xxx firmware< 4.001.0000000.0.r.210710
dahuasecurity nvr-6xx firmware< 4.001.0000001.1.r.210716

Public Exploits & PoCs

2

Detection Rules (IDS/IPS)

1
Open rulesets (ET Open, Snort Community, abuse.ch) link to source. Commercial rulesets are reference-only.

Scoring & Timeline

9.8
CRITICAL · CVSS v3.1 · cybersecurity@dahuatech.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD15 Sep 2021 · 10:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
yes
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.

Vendor Advisories

1
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://seclists.org/fulldisclosure/2021/Oct/13ExploitMailing ListThird Party Advisory
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