CVE-2021-33045 is an authentication-bypass vulnerability in Dahua IP cameras. It involves a loopback login request using the 127.0.0.1 address. The flaw allows attackers to bypass device identity 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.