{"cve":{"cve_id":"CVE-2023-28767","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":0.00361,"epss_percentile":0.27785,"epss_as_of":"2026-06-23","description":"The configuration parser fails to sanitize user-controlled input in the Zyxel ATP series firmware versions 5.10 through 5.36, USG FLEX series firmware versions 5.00 through 5.36,  USG FLEX 50(W) series firmware versions 5.10 through 5.36, \n\nUSG20(W)-VPN series firmware versions 5.10 through 5.36, and VPN series firmware versions 5.00 through 5.36. An unauthenticated, LAN-based attacker could leverage the vulnerability to inject some operating system (OS) commands into the device configuration data on an affected device when the cloud management mode is enabled.","published_at":"2023-07-17T16:59:45.258000Z","last_modified_at":null,"cvss_v3_score":8.8,"cvss_v3_vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvss_v3_severity":"HIGH","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":"none","ssvc_automatable":false,"ssvc_technical_impact":"total","cwes":["CWE-78"],"nvd_references":["https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-wlan-controllers"],"vuln_status":null,"trending_score":null,"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":"2026-06-24T00:09:39.878444Z","updated_at":"2026-06-29T01:29:15.447901Z"},"effective_severity":"HIGH","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"A","value_label":"Adjacent"},{"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":[{"vendor_slug":"zyxel","vendor_name":"Zyxel","product_slug":"atp-series-firmware","product_name":"ATP series firmware","version_start":"5.10 through 5.36","version_start_inclusive":true,"version_end":"5.10 through 5.36","version_end_inclusive":true,"cpe23_uri":"cve5:zyxel:atp-series-firmware:5.10 through 5.36:5.10 through 5.36"},{"vendor_slug":"zyxel","vendor_name":"Zyxel","product_slug":"usg20-w-vpn-series-firmware","product_name":"USG20(W)-VPN series firmware","version_start":"5.10 through 5.36","version_start_inclusive":true,"version_end":"5.10 through 5.36","version_end_inclusive":true,"cpe23_uri":"cve5:zyxel:usg20-w-vpn-series-firmware:5.10 through 5.36:5.10 through 5.36"},{"vendor_slug":"zyxel","vendor_name":"Zyxel","product_slug":"usg-flex-50-w-series-firmware","product_name":"USG FLEX 50(W) series firmware","version_start":"5.10 through 5.36","version_start_inclusive":true,"version_end":"5.10 through 5.36","version_end_inclusive":true,"cpe23_uri":"cve5:zyxel:usg-flex-50-w-series-firmware:5.10 through 5.36:5.10 through 5.36"},{"vendor_slug":"zyxel","vendor_name":"Zyxel","product_slug":"usg-flex-series-firmware","product_name":"USG FLEX series firmware","version_start":"5.00 through 5.36","version_start_inclusive":true,"version_end":"5.00 through 5.36","version_end_inclusive":true,"cpe23_uri":"cve5:zyxel:usg-flex-series-firmware:5.00 through 5.36:5.00 through 5.36"},{"vendor_slug":"zyxel","vendor_name":"Zyxel","product_slug":"vpn-series-firmware","product_name":"VPN series firmware","version_start":"5.00 through 5.36","version_start_inclusive":true,"version_end":"5.00 through 5.36","version_end_inclusive":true,"cpe23_uri":"cve5:zyxel:vpn-series-firmware:5.00 through 5.36:5.00 through 5.36"}],"exploit_refs":[],"news":[],"references":[{"url":"https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-wlan-controllers","source_type":"VENDOR_ADVISORY","tags":["advisory"]}],"timeline":[{"type":"published","at":"2023-07-17T16:59:45.258000Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:27:44.223063Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:27:44.223063Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:27:44.223063Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"ssvc_changed","at":"2026-06-29T01:29:15.447901Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T01:29:15.447901Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T01:29:15.447901Z","label":"SSVC decision revised","source":"vulnrichment"}]}