{"schema":"threatline.record/2","record":{"id":"CVE-2021-33045","aliases":[],"summary":"Dahua IP Camera Authentication Bypass Vulnerability","details":"Dahua IP cameras and related products contain an authentication bypass vulnerability when the loopback device is specified by the client during authentication.","categories":["Industrial & IoT"],"product":"IP Camera Firmware","vendor":"Dahua","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2021-33045","source_modified_at":"2026-01-12T19:53:51.321Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Some Dahua IP Camera, Video Intercom, NVR, XVR devices","vendor":"n/a","versions":[{"status":"affected","version":"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."}],"defaultStatus":null}],"fixed_versions":[],"cvss":9.8,"severity":"Critical","kev":{"listed":true,"date_added":"2024-08-21","due_date":"2024-09-11","required_action":"Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.","ransomware_campaign_use":"Unknown"},"epss":{"probability":0.99593,"percentile":0.99948,"score_date":"2026-10-23"},"published_at":"2021-09-15T21:50:08.000Z","modified_at":"2026-01-12T19:53:51.321Z","provenance":[{"source":"CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T17:00:09.9001Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2021-33045","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-01-12T19:53:51.321Z"},{"source":"Nuclei","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-33045.yaml","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":null},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2021-33045","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CISA KEV","CVE List","Nuclei","EPSS"],"references":[{"url":"https://www.dahuasecurity.com/aboutUs/trustedCenter/details/582","source":"CISA KEV"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-33045","source":"CISA KEV"},{"source":"CVE List","url":"https://www.dahuasecurity.com/support/cybersecurity/details/957","tags":["x_refsource_MISC","x_transferred"]},{"source":"CVE List","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-33045","tags":["government-resource"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CISA ADP","ssvc":{"exploitation":"active","automatable":"yes","technical_impact":"total","assessed_at":"2024-09-05T15:03:50.889187Z"},"exploits":[{"source":"Nuclei","kind":"Scanner template","name":"Dahua IPC/VTH/VTO - Authentication Bypass","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-33045.yaml"}],"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-01-12T19:53:51.321Z","content_hash":"65d928971f3b4318bbf8686f5a24f52594174d7702dd0e61ac666088f1cbbdbb"}}