{"items":[{"id":"NVI-00000499","kind":"vulnerability","title":"Zyxel Multiple Firewalls OS Command Injection Vulnerability","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","CISA catalog date-added and due-date fields are not the original vulnerability disclosure date or universal legal deadlines.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["CVE-2023-28771"],"plain_summary":"CISA lists CVE-2023-28771 in its Known Exploited Vulnerabilities catalog. The catalog names Zyxel Multiple Firewalls; it does not establish that a particular visitor is exposed or compromised.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Apply updates per vendor instructions.","source_ids":["sr-4608c585274257093ffaf4ea4cf83e7b"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null},{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-1c0a53da2e043318064d5c2d415121f8"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CISA_KEV","as_of":"2023-05-31T00:00:00.000Z","value":"Listed","meaning":"CISA lists known exploitation. 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This report has not examined your application.","related_sources":[{"id":"sr-4608c585274257093ffaf4ea4cf83e7b","url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","basis":"official_catalog","notes":"CISA KEV; CC0 1.0. Catalog assertions are not evidence of customer compromise.","title":"CVE-2023-28771","publisher":"CISA","observed_at":"2026-10-31T20:54:12.600Z"},{"id":"sr-33c1798cd8aa6853dc28dd3b9d2f6cce","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-28771","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2023-28771","publisher":"NIST National Vulnerability Database","observed_at":"2026-10-31T21:43:16.211Z"},{"id":"sr-1c0a53da2e043318064d5c2d415121f8","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. 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Follow the linked vendor advisory for version and configuration prerequisites.","public_affected_ranges":[]}],"null_published_at":"2026-10-31T21:53:28.046Z","source_updated_at":"2023-05-31T00:00:00.000Z","source_disclosed_at":null,"is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-10-31T20:54:12.600Z"},{"id":"NVI-00000499","kind":"vulnerability","title":"Zyxel Multiple Firewalls OS Command Injection Vulnerability","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","CISA catalog date-added and due-date fields are not the original vulnerability disclosure date or universal legal deadlines."],"lifecycle":"active","identifiers":["CVE-2023-28771"],"plain_summary":"CISA lists CVE-2023-28771 in its Known Exploited Vulnerabilities catalog. The catalog names Zyxel Multiple Firewalls; it does not establish that a particular visitor is exposed or compromised.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Apply updates per vendor instructions.","source_ids":["sr-4608c585274257093ffaf4ea4cf83e7b"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CISA_KEV","as_of":"2023-05-31T00:00:00.000Z","value":"Listed","meaning":"CISA lists known exploitation. This does not establish exploitation of your system.","source_id":"sr-4608c585274257093ffaf4ea4cf83e7b"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-4608c585274257093ffaf4ea4cf83e7b","url":"https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json","basis":"official_catalog","notes":"CISA KEV; CC0 1.0. Catalog assertions are not evidence of customer compromise.","title":"CVE-2023-28771","publisher":"CISA","observed_at":"2026-10-31T20:54:12.600Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-4608c585274257093ffaf4ea4cf83e7b"],"technology":"Zyxel Multiple Firewalls","known_exclusions":[],"conditions_summary":"CISA does not supply a complete application-specific affected range here. Follow the linked vendor advisory for version and configuration prerequisites.","public_affected_ranges":[]}],"null_published_at":"2026-10-31T21:27:40.703Z","source_updated_at":"2023-05-31T00:00:00.000Z","source_disclosed_at":null,"is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-10-31T20:54:12.600Z"}],"next_cursor":null,"snapshot_revision":"42594"}