{"cve":"CVE-2019-15800","nvd":{"published":"2019-11-14T21:15:11.687","modified":"2026-06-17T02:21:05.997","status":"Modified","description":"An issue was discovered on Zyxel GS1900 devices with firmware before 2.50(AAHH.0)C0. Due to lack of input validation in the cmd_sys_traceroute_exec(), cmd_sys_arp_clear(), and cmd_sys_ping_exec() functions in the libclicmd.so library contained in the firmware, an attacker could leverage these functions to call system() and execute arbitrary commands on the switches. (Note that these functions are currently not called in this version of the firmware, however an attacker could use other vulnerabilities to finally use these vulnerabilities to gain code execution.)","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-78"],"references":["https://jasper.la/exploring-zyxel-gs1900-firmware-with-ghidra.html","https://www.zyxel.com/support/gs1900-switch-vulnerabilities.shtml","https://jasper.la/exploring-zyxel-gs1900-firmware-with-ghidra.html","https://www.zyxel.com/support/gs1900-switch-vulnerabilities.shtml"],"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-2019-15800","score":0.03872,"percentile":0.90203,"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."]}