{"cve":{"cve_id":"CVE-2023-35136","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":0.00243,"epss_percentile":0.15221,"epss_as_of":"2026-06-23","description":"An improper input validation vulnerability in the “Quagga” package of the Zyxel ATP series firmware versions 4.32 through 5.37, USG FLEX series firmware versions 4.50 through 5.37, USG FLEX 50(W) series firmware versions 4.16 through 5.37, USG20(W)-VPN series firmware versions 4.16 through 5.37, and VPN series firmware versions 4.30 through 5.37, could allow an authenticated local attacker to access configuration files on an affected device.","published_at":"2023-11-28T01:16:16.723000Z","last_modified_at":null,"cvss_v3_score":5.5,"cvss_v3_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","cvss_v3_severity":"MEDIUM","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":"none","ssvc_automatable":false,"ssvc_technical_impact":"partial","cwes":["CWE-20"],"nvd_references":["https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-aps"],"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":"2026-06-29T01:32:48.307488Z"},"effective_severity":"MEDIUM","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"L","value_label":"Local"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"L","value_label":"Low"},{"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":"N","value_label":"None"},{"metric":"A","name":"Availability","value":"N","value_label":"None"}]},"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":"versions 4.32 through 5.37","version_start_inclusive":true,"version_end":"versions 4.32 through 5.37","version_end_inclusive":true,"cpe23_uri":"cve5:zyxel:atp-series-firmware:versions 4.32 through 5.37:versions 4.32 through 5.37"},{"vendor_slug":"zyxel","vendor_name":"Zyxel","product_slug":"usg20-w-vpn-series-firmware","product_name":"USG20(W)-VPN series firmware","version_start":"versions 4.16 through 5.37","version_start_inclusive":true,"version_end":"versions 4.16 through 5.37","version_end_inclusive":true,"cpe23_uri":"cve5:zyxel:usg20-w-vpn-series-firmware:versions 4.16 through 5.37:versions 4.16 through 5.37"},{"vendor_slug":"zyxel","vendor_name":"Zyxel","product_slug":"usg-flex-50-w-series-firmware","product_name":"USG FLEX 50(W) series firmware","version_start":"versions 4.16 through 5.37","version_start_inclusive":true,"version_end":"versions 4.16 through 5.37","version_end_inclusive":true,"cpe23_uri":"cve5:zyxel:usg-flex-50-w-series-firmware:versions 4.16 through 5.37:versions 4.16 through 5.37"},{"vendor_slug":"zyxel","vendor_name":"Zyxel","product_slug":"usg-flex-series-firmware","product_name":"USG FLEX series firmware","version_start":"versions 4.50 through 5.37","version_start_inclusive":true,"version_end":"versions 4.50 through 5.37","version_end_inclusive":true,"cpe23_uri":"cve5:zyxel:usg-flex-series-firmware:versions 4.50 through 5.37:versions 4.50 through 5.37"},{"vendor_slug":"zyxel","vendor_name":"Zyxel","product_slug":"vpn-series-firmware","product_name":"VPN series firmware","version_start":"versions 4.30 through 5.37","version_start_inclusive":true,"version_end":"versions 4.30 through 5.37","version_end_inclusive":true,"cpe23_uri":"cve5:zyxel:vpn-series-firmware:versions 4.30 through 5.37:versions 4.30 through 5.37"}],"exploit_refs":[],"news":[],"references":[{"url":"https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-in-firewalls-and-aps","source_type":"VENDOR_ADVISORY","tags":["advisory"]}],"timeline":[{"type":"published","at":"2023-11-28T01:16:16.723000Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:28:48.844579Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:28:48.844579Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:28:48.844579Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"ssvc_changed","at":"2026-06-29T01:32:48.307488Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T01:32:48.307488Z","label":"SSVC decision revised","source":"vulnrichment"},{"type":"ssvc_changed","at":"2026-06-29T01:32:48.307488Z","label":"SSVC decision revised","source":"vulnrichment"}]}