{"cve":"CVE-2019-15799","nvd":{"published":"2019-11-14T21:15:11.623","modified":"2026-06-17T02:21:05.847","status":"Modified","description":"An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. User accounts created through the web interface of the device, when given non-admin level privileges, have the same level of privileged access as administrators when connecting to the device via SSH (while their permissions via the web interface are in fact restricted). This allows normal users to obtain the administrative password by running the tech-support command via the CLI: this contains the encrypted passwords for all users on the device. As these passwords are encrypted using well-known and static parameters, they can be decrypted and the original passwords (including the administrator password) can be obtained.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8},"cwes":["CWE-269"],"references":["https://jasper.la/exploring-zyxel-gs1900-firmware-with-ghidra.html","https://vimeo.com/354726424","https://www.zyxel.com/support/gs1900-switch-vulnerabilities.shtml","https://jasper.la/exploring-zyxel-gs1900-firmware-with-ghidra.html","https://vimeo.com/354726424"],"products":["zyxel:gs1900-10hp_firmware","zyxel:gs1900-16_firmware","zyxel:gs1900-24_firmware","zyxel:gs1900-24e_firmware","zyxel:gs1900-24hp_firmware","zyxel:gs1900-48_firmware","zyxel:gs1900-48hp_firmware","zyxel:gs1900-8_firmware","zyxel:gs1900-8hp_firmware"],"source":"nvd","synced_at":"2026-10-19T20:59:25.448946135+00:00"},"epss":{"cve":"CVE-2019-15799","score":0.02309,"percentile":0.83372,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}