{"cve":"CVE-2021-33044","nvd":{"published":"2021-09-15T22:15:10.497","modified":"2026-06-17T03:54:03.827","status":"Analyzed","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-287"],"references":["http://packetstormsecurity.com/files/164423/Dahua-Authentication-Bypass.html","http://seclists.org/fulldisclosure/2021/Oct/13","https://www.dahuasecurity.com/support/cybersecurity/details/957","http://packetstormsecurity.com/files/164423/Dahua-Authentication-Bypass.html","http://seclists.org/fulldisclosure/2021/Oct/13"],"products":["dahuasecurity:ipc-hum7xxx_firmware","dahuasecurity:ipc-hx3xxx_firmware","dahuasecurity:ipc-hx5xxx_firmware","dahuasecurity:sd1a1_firmware","dahuasecurity:sd22_firmware","dahuasecurity:sd49_firmware","dahuasecurity:sd50_firmware","dahuasecurity:sd52c_firmware","dahuasecurity:sd6al_firmware","dahuasecurity:tpc-bf1241_firmware","dahuasecurity:tpc-bf2221_firmware","dahuasecurity:tpc-bf5x01_firmware","dahuasecurity:tpc-bf5x21_firmware","dahuasecurity:tpc-pt8x21b_firmware","dahuasecurity:tpc-sd2221_firmware","dahuasecurity:tpc-sd8x21_firmware","dahuasecurity:vth-542xh_firmware","dahuasecurity:vto-65xxx_firmware","dahuasecurity:vto-75x95x_firmware"],"source":"nvd","synced_at":"2026-10-19T21:23:41.316049955+00:00"},"epss":{"cve":"CVE-2021-33044","score":0.99989,"percentile":0.99984,"date":"2026-10-31"},"kev":{"cve":"CVE-2021-33044","date_added":"2024-08-21","due_date":"2024-09-11","vendor":"Dahua","product":"IP Camera Firmware","known_ransomware":false},"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}