{"id":"CVE-2017-7921","aliases":[],"url":"https://o3.security/vulnerability/CVE-2017-7921","summary":"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…","details":"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":"2017-05-06T00:00:00.000Z","modified":"2026-03-06T05:01:18.718Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":{"score":0.99998,"percentile":0.9999,"asOf":"2026-08-28"},"cisaKev":null,"exploitsKnown":20,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://ics-cert.us-cert.gov/advisories/ICSA-17-124-01"},{"type":"WEB","url":"http://www.securityfocus.com/bid/98313"},{"type":"WEB","url":"https://ghostbin.com/paste/q2vq2"},{"type":"WEB","url":"http://www.hikvision.com/us/about_10805.html"},{"type":"WEB","url":"https://www.hikvision.com/us-en/support/document-center/special-notices/privilege-escalating-vulnerability-in-certain-hikvision-ip-cameras/"},{"type":"WEB","url":"https://www.hikvision.com/cn/support/CybersecurityCenter/SecurityNotices/20170314/"},{"type":"WEB","url":"https://www.hikvision.com/en/support/cybersecurity/security-advisory/security-notification--privilege-escalating-vulnerability-in-cer/"},{"type":"WEB","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-7921"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-03-06T05:01:18.718Z"}}