CVE-2021-33044 is an authentication-bypass vulnerability in Dahua IP cameras and related products. Attackers can bypass device identity authentication by constructing malicious data packets. The flaw is triggered by a NetKeyboard client type during authentication. Dahua rates it 8.1 on the CVSS scale, while NVD assigns a score of 9.8. It remains listed in CISA's Known Exploited Vulnerabilities catalog as of August 19, 2026.