{"id":"CVE-2020-9502","aliases":["EUVD-2020-30308","GHSA-rqmc-r2j8-rwq3"],"status":"published","title":"Some Dahua products with Build time before December 2019 have Session ID predictable...","description":"Some Dahua products with Build time before December 2019 have Session ID predictable vulnerabilities. During normal user access, an attacker can use the predicted Session ID to construct a data packet to attack the device.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.01527,"percentile":0.7485,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-330"],"published":"2020-05-13T15:21:12Z","modified":"2026-06-17T03:28:04Z","products":[{"vendor":"dahuasecurity","product":"ipc-hdbw1320e-w_firmware"},{"vendor":"dahuasecurity","product":"ipc-hx2xxx_firmware"},{"vendor":"dahuasecurity","product":"ipc-hx5842h_firmware"},{"vendor":"dahuasecurity","product":"ipc-hx7842h_firmware"},{"vendor":"dahuasecurity","product":"ipc-hxxx5x4x_firmware"},{"vendor":"dahuasecurity","product":"n42b1p_firmware"},{"vendor":"dahuasecurity","product":"n42b2p_firmware"},{"vendor":"dahuasecurity","product":"n42b3p_firmware"},{"vendor":"dahuasecurity","product":"n52a4p_firmware"},{"vendor":"dahuasecurity","product":"n52b2p_firmware"},{"vendor":"dahuasecurity","product":"n52b3p_firmware"},{"vendor":"dahuasecurity","product":"n52b5p_firmware"},{"vendor":"dahuasecurity","product":"n54a4p_firmware"},{"vendor":"dahuasecurity","product":"n54b2p_firmware"},{"vendor":"dahuasecurity","product":"ptz1a_firmware"},{"vendor":"dahuasecurity","product":"sd1a_firmware"},{"vendor":"dahuasecurity","product":"sd50_firmware"},{"vendor":"dahuasecurity","product":"sd52c_firmware"},{"vendor":"dahuasecurity","product":"sd5a_firmware"},{"vendor":"dahuasecurity","product":"sd6al_firmware"}],"references":[{"url":"https://www.dahuasecurity.com/support/cybersecurity/details/777","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-9502"},{"url":"https://github.com/advisories/GHSA-rqmc-r2j8-rwq3"}],"sources":{"cve":[{"id":"CVE-2020-9502","description":"Some Dahua products with Build time before December 2019 have Session ID predictable vulnerabilities. During normal user access, an attacker can use the predicted Session ID to construct a data packet to attack the device.","status":"published","published":"2020-05-13T15:21:12Z","modified":"2024-08-04T10:34:38.156Z","updated_at":"2026-11-02T14:35:49.209579Z"}],"euvd":[{"id":"EUVD-2020-30308","description":"Some Dahua products with Build time before December 2019 have Session ID predictable vulnerabilities. During normal user access, an attacker can use the predicted Session ID to construct a data packet to attack the device.","status":"published","published":"2020-05-13T15:21:12Z","modified":"2024-08-04T10:34:38Z","updated_at":"2026-11-03T03:07:53.493042Z"}],"ghsa":[{"id":"GHSA-rqmc-r2j8-rwq3","title":"Some Dahua products with Build time before December 2019 have Session ID predictable...","description":"Some Dahua products with Build time before December 2019 have Session ID predictable vulnerabilities. During normal user access, an attacker can use the predicted Session ID to construct a data packet to attack the device.","status":"published","published":"2022-05-24T17:17:49Z","modified":"2023-01-29T05:02:39Z","updated_at":"2026-11-02T14:45:08.540426Z"}],"nvd":[{"id":"CVE-2020-9502","description":"Some Dahua products with Build time before December 2019 have Session ID predictable vulnerabilities. During normal user access, an attacker can use the predicted Session ID to construct a data packet to attack the device.","status":"published","published":"2020-05-13T16:15:13.277Z","modified":"2026-06-17T03:28:04.937Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-330"],"updated_at":"2026-11-02T14:06:00.784809Z"}]}}