CVE-2021-33045
Dahua IP Camera Authentication Bypass Vulnerability
- Critical 9.8
- Exploited: added to CISA KEV 21 Aug 2024
Description
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.
Key facts
- Published
- 15 Sep 2021
- Last changed
- 12 Jan 2026
- Assigned by
- dahua
- KEV added
- 21 Aug 2024
- KEV fix due
- 11 Sep 2024
- EPSS
- 99.593% likely to be exploited in the next 30 days, higher than 99.947% of CVEs (scores for 15 Nov 2026)
- SSVC (CISA)
- Exploitation: active; Automatable: yes; Technical impact: total
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 9.8CVSS 3.1, Criticalfrom CISA (ADP container)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
What to do
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.CISA KEV required action
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| n/a | Some Dahua IP Camera, Video Intercom, NVR, XVR devices |
|
Timeline
- 15 Sep 2021 Published
- 21 Aug 2024 Added to the CISA KEV catalogue