# CVE-2021-33045: Dahua IP Camera Authentication Bypass Vulnerability

> CVE-2021-33045: Dahua IP Camera Authentication Bypass Vulnerability. CVSS 9.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2021-33045
Last updated: 2026-01-12T19:53:51Z

- Published: 2021-09-15 21:50 UTC · Updated: 2026-01-12 19:53 UTC · Assigner: dahua
- CVSS: 9.8 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS: 99.6%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2024-08-21, federal due date 2024-09-11, ransomware use: Unknown

## 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.

## CISA required action

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

## Affected vendors and products

- n/a: Some Dahua IP Camera, Video Intercom, NVR, XVR devices

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2021-33045)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2021-33045)
- [http://packetstormsecurity.com/files/164423/Dahua-Authentication-Bypass.html](http://packetstormsecurity.com/files/164423/Dahua-Authentication-Bypass.html)
- [http://seclists.org/fulldisclosure/2021/Oct/13](http://seclists.org/fulldisclosure/2021/Oct/13)
- [https://www.dahuasecurity.com/support/cybersecurity/details/957](https://www.dahuasecurity.com/support/cybersecurity/details/957)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2021-33045 · Markdown: https://rewindex.com/cve/CVE-2021-33045.md · JSON: https://rewindex.com/api/v1/cves/CVE-2021-33045 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:10:15.409Z