CVE-2021-33044

critical

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.

References

https://thehackernews.com/2026/09/human-attacker-exploits-marimo-rce.html

https://www.securityweek.com/threat-actor-hacks-14000-ip-cameras-in-ukraine-and-russia/

https://www.bleepingcomputer.com/news/security/hackers-compromise-14-500-dahua-web-cameras-in-35-day-campaign/

https://thehackernews.com/2026/08/hackers-compromised-14500-dahua-devices.html

https://thehackernews.com/2026/03/iran-linked-muddywater-hackers-target.html

https://www.theregister.com/2026/03/04/iranian_hacking_attempts_ip_cameras/

https://www.infosecurity-magazine.com/news/iran-attacks-surveillance-cameras/

https://research.checkpoint.com/2026/interplay-between-iranian-targeting-of-ip-cameras-and-physical-warfare-in-the-middle-east/

https://www.infosecurity-magazine.com/news/webcams-vulnerable-hiatusrat-fbi/

https://thehackernews.com/2024/12/cisa-and-fbi-raise-alerts-on-exploited.html

https://www.bleepingcomputer.com/news/security/fbi-spots-hiatusrat-malware-attacks-targeting-web-cameras-dvrs/

https://www.cisa.gov/news-events/cybersecurity-advisories/aa24-317a

https://www.theregister.com/2024/09/05/uncle_sam_charges_russian_gru/

https://www.cisa.gov/news-events/cybersecurity-advisories/aa24-249a

https://www.tenable.com/blog/cyber-retaliation-analyzing-iranian-cyber-activity-following-operation-epic-fury

https://github.com/Exhunterx/eyesharvester

https://github.com/0x5477/Ingram-Pro

https://github.com/litndat/Camera-Dahua-Research-l-h-ng-CVE-2021-33044

https://github.com/mrhenrike/EmbedXPL-Forge

https://github.com/Bd-Mutant7/DahuaLoginBypass

https://github.com/eagle-nett/DAHUA_AUTH-BYPASS-CVE-2021-33044

https://github.com/umair-aziz025/dahua-cve-research

https://github.com/Baza-NATO/CVE-2021-33044

https://github.com/Alonzozzz/alonzzzo

https://github.com/bp2008/DahuaLoginBypass

https://www.dahuasecurity.com/support/cybersecurity/details/957

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-33044

http://seclists.org/fulldisclosure/2021/Oct/13

http://packetstormsecurity.com/files/164423/Dahua-Authentication-Bypass.html

Details

Source: Mitre, NVD

Published: 2021-09-15

Updated: 2026-06-17

Known Exploited Vulnerability (KEV)

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 9.8

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H