{"cve":{"cve_id":"CVE-2017-7921","is_kev":true,"kev_date_added":"2026-03-05","kev_vendor_project":"Hikvision","kev_product":"Multiple Products","kev_vulnerability_name":"Hikvision Multiple Products Improper Authentication Vulnerability","kev_short_description":"Multiple Hikvision products contain an improper authentication vulnerability that could allow a malicious user to escalate privileges on the system and gain access to sensitive information.","kev_required_action":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.","kev_due_date":"2026-03-26","kev_known_ransomware":false,"kev_notes":"https://www.hikvision.com/us-en/support/document-center/special-notices/privilege-escalating-vulnerability-in-certain-hikvision-ip-cameras/ ; https://nvd.nist.gov/vuln/detail/CVE-2017-7921","kev_cwes":["CWE-287"],"epss_score":0.99998,"epss_percentile":0.99989,"epss_as_of":"2026-06-23","description":"An Improper Authentication issue was discovered in Hikvision DS-2CD2xx2F-I Series V5.2.0 build 140721 to V5.4.0 build 160530, DS-2CD2xx0F-I Series V5.2.0 build 140721 to V5.4.0 Build 160401, DS-2CD2xx2FWD Series V5.3.1 build 150410 to V5.4.4 Build 161125, DS-2CD4x2xFWD Series V5.2.0 build 140721 to V5.4.0 Build 160414, DS-2CD4xx5 Series V5.2.0 build 140721 to V5.4.0 Build 160421, DS-2DFx Series V5.2.0 build 140805 to V5.4.5 Build 160928, and DS-2CD63xx Series V5.0.9 build 140305 to V5.3.5 Build 160106 devices. The improper authentication vulnerability occurs when an application does not adequately or correctly authenticate users. This may allow a malicious user to escalate his or her privileges on the system and gain access to sensitive information.","published_at":"2017-05-06T00:00:00Z","last_modified_at":null,"cvss_v3_score":9.8,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvss_v3_severity":"CRITICAL","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":"active","ssvc_automatable":true,"ssvc_technical_impact":"total","cwes":["CWE-287"],"nvd_references":["https://ics-cert.us-cert.gov/advisories/ICSA-17-124-01","http://www.securityfocus.com/bid/98313","https://ghostbin.com/paste/q2vq2","http://www.hikvision.com/us/about_10805.html"],"vuln_status":null,"trending_score":0.6099964,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-24T00:09:31.350578Z","updated_at":"2026-06-29T02:30:27.550645Z"},"effective_severity":"CRITICAL","badges":["kev","poc","epss"],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"N","value_label":"None"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"H","value_label":"High"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[],"exploit_refs":[{"source":"nuclei","kind":"nuclei","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2017/CVE-2017-7921.yaml","title":"Hikvision - Authentication Bypass","author":"princechaddha","disclosed_at":null}],"news":[],"references":[{"url":"https://ics-cert.us-cert.gov/advisories/ICSA-17-124-01","source_type":"VENDOR_ADVISORY","tags":["advisory"]},{"url":"http://www.securityfocus.com/bid/98313","source_type":"MISC","tags":[]},{"url":"https://ghostbin.com/paste/q2vq2","source_type":"MISC","tags":[]},{"url":"http://www.hikvision.com/us/about_10805.html","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2017-05-06T00:00:00Z","label":"CVE published","source":null},{"type":"cisa_reported","at":"2026-03-05T00:00:00Z","label":"Added to CISA KEV catalog","source":"kev"},{"type":"poc_available","at":"2026-06-24T00:29:48.638073Z","label":"Public PoC available","source":"nuclei"},{"type":"ssvc_changed","at":"2026-06-24T00:31:10.389451Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-24T00:31:10.389451Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-24T00:31:10.389451Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-06-24T00:31:10.389451Z","label":"CVSS score revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-06-24T00:31:10.389451Z","label":"CVSS score revised","source":"vulnrichment"},{"type":"cvss_changed","at":"2026-06-24T00:31:10.389451Z","label":"CVSS score revised","source":"vulnrichment"}]}