{"schema":"threatline.record/2","record":{"id":"CVE-2021-33044","aliases":[],"summary":"Dahua IP Camera Authentication Bypass Vulnerability","details":"Dahua IP cameras and related products contain an authentication bypass vulnerability when the NetKeyboard type argument 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-2021-33044","source_modified_at":"2026-01-12T19:53:16.325Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Some Dahua IP Camera, Video Intercom, PTZ Dome Camera, Thermal Camera devices","vendor":"n/a","versions":[{"status":"affected","version":"Dahua IP Camera devices IPC-HX3XXX, IPC-HX5XXX, and IPC-HUM7XXX, Video Intercom devices VTO75X95X, VTO65XXX, and VTH542XH, PTZ Dome Camera SD1A1, SD22, SD49, SD50, SD52C, and SD6AL, Thermal TPC-BF1241, TPC-BF2221, TPC-SD2221, TPC-BF5XXX, TPC-SD8X21, and TPC-PT8X21B devices Buildtime before June, 2021."}],"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":0.99989,"percentile":0.99985,"score_date":"2026-10-23"},"published_at":"2021-09-15T21:36:04.000Z","modified_at":"2026-01-12T19:53:16.325Z","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-2021-33044","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-01-12T19:53:16.325Z"},{"source":"Nuclei","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-33044.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-2021-33044","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-2021-33044","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-2021-33044","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":"2024-09-05T14:59:48.366509Z"},"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-2021-33044.yaml"}],"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-01-12T19:53:16.325Z","content_hash":"3d48228e1968920a0218fc57a0e4c323f4d4bd6372d76d3a8e2654f45a12dcd6"}}