# CVE-2021-33045

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.

- Page: https://www.vulneraibility.com/cve/CVE-2021-33045
- CVSS: 9.8
- Known exploited: yes, in CISA KEV since 2024-08-21; CISA due date 2024-09-11
- EPSS: 99.59%
- Unvetted proof-of-concept code on GitHub: 1 GitHub proof of concept · 1 Nuclei template (first 2021-10-11)
- CISA SSVC: exploitation active, automatable yes, technical impact total (assessed 2024-09-05)
- Weakness: CWE-287
- Published: 2021-09-15

## Affected versions

- Some Dahua IP Camera, Video Intercom, NVR, XVR devices: affected 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.

A version outside these ranges is not a statement that it is unaffected.

## References

- [other] https://www.dahuasecurity.com/support/cybersecurity/details/957
- [other] http://seclists.org/fulldisclosure/2021/Oct/13
- [other] http://packetstormsecurity.com/files/164423/Dahua-Authentication-Bypass.html
- [other] https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-33045

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.