{"cve":{"cve_id":"CVE-2022-0023","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":0.00683,"epss_percentile":0.47697,"epss_as_of":"2026-06-23","description":"An improper handling of exceptional conditions vulnerability exists in the DNS proxy feature of Palo Alto Networks PAN-OS software that enables a meddler-in-the-middle (MITM) to send specifically crafted traffic to the firewall that causes the service to restart unexpectedly. Repeated attempts to send this request result in denial-of-service to all PAN-OS services by restarting the device in maintenance mode. This issue does not impact Panorama appliances and Prisma Access customers. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.22; PAN-OS 9.0 versions earlier than PAN-OS 9.0.16; PAN-OS 9.1 versions earlier than PAN-OS 9.1.13; PAN-OS 10.0 versions earlier than PAN-OS 10.0.10; PAN-OS 10.1 versions earlier than PAN-OS 10.1.5. This issue does not impact PAN-OS 10.2.","published_at":"2022-04-13T18:35:10.474000Z","last_modified_at":null,"cvss_v3_score":5.9,"cvss_v3_vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","cvss_v3_severity":"MEDIUM","cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":["CWE-755"],"nvd_references":["https://security.paloaltonetworks.com/CVE-2022-0023"],"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":"2026-06-28T23:16:39.962714Z"},"effective_severity":"MEDIUM","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"N","value_label":"Network"},{"metric":"AC","name":"Attack Complexity","value":"H","value_label":"High"},{"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":"N","value_label":"None"},{"metric":"I","name":"Integrity","value":"N","value_label":"None"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"palo-alto-networks","vendor_name":"Palo Alto Networks","product_slug":"pan-os","product_name":"pan-os","version_start":"10.2.*","version_start_inclusive":true,"version_end":"10.2.*","version_end_inclusive":true,"cpe23_uri":"cve5:palo-alto-networks:pan-os:10.2.*:10.2.*"},{"vendor_slug":"palo-alto-networks","vendor_name":"Palo Alto Networks","product_slug":"pan-os","product_name":"pan-os","version_start":"8.1","version_start_inclusive":true,"version_end":"8.1.22","version_end_inclusive":false,"cpe23_uri":"cve5:palo-alto-networks:pan-os:8.1:8.1.22"},{"vendor_slug":"palo-alto-networks","vendor_name":"Palo Alto Networks","product_slug":"pan-os","product_name":"pan-os","version_start":"9.1","version_start_inclusive":true,"version_end":"9.1.13","version_end_inclusive":false,"cpe23_uri":"cve5:palo-alto-networks:pan-os:9.1:9.1.13"},{"vendor_slug":"palo-alto-networks","vendor_name":"Palo Alto Networks","product_slug":"pan-os","product_name":"pan-os","version_start":"10.1","version_start_inclusive":true,"version_end":"10.1.5","version_end_inclusive":false,"cpe23_uri":"cve5:palo-alto-networks:pan-os:10.1:10.1.5"},{"vendor_slug":"palo-alto-networks","vendor_name":"Palo Alto Networks","product_slug":"pan-os","product_name":"pan-os","version_start":"10.0","version_start_inclusive":true,"version_end":"10.0.10","version_end_inclusive":false,"cpe23_uri":"cve5:palo-alto-networks:pan-os:10.0:10.0.10"},{"vendor_slug":"palo-alto-networks","vendor_name":"Palo Alto Networks","product_slug":"pan-os","product_name":"pan-os","version_start":"9.0","version_start_inclusive":true,"version_end":"9.0.16","version_end_inclusive":false,"cpe23_uri":"cve5:palo-alto-networks:pan-os:9.0:9.0.16"},{"vendor_slug":"palo-alto-networks","vendor_name":"Palo Alto Networks","product_slug":"prisma-access","product_name":"Prisma Access","version_start":"3.0 Preferred, Innovation","version_start_inclusive":true,"version_end":"3.0 Preferred, Innovation","version_end_inclusive":true,"cpe23_uri":"cve5:palo-alto-networks:prisma-access:3.0 Preferred, Innovation:3.0 Preferred, Innovation"},{"vendor_slug":"palo-alto-networks","vendor_name":"Palo Alto Networks","product_slug":"prisma-access","product_name":"Prisma Access","version_start":"2.2 Preferred","version_start_inclusive":true,"version_end":"2.2 Preferred","version_end_inclusive":true,"cpe23_uri":"cve5:palo-alto-networks:prisma-access:2.2 Preferred:2.2 Preferred"},{"vendor_slug":"palo-alto-networks","vendor_name":"Palo Alto Networks","product_slug":"prisma-access","product_name":"Prisma Access","version_start":"2.1 Preferred, Innovation","version_start_inclusive":true,"version_end":"2.1 Preferred, Innovation","version_end_inclusive":true,"cpe23_uri":"cve5:palo-alto-networks:prisma-access:2.1 Preferred, Innovation:2.1 Preferred, Innovation"}],"exploit_refs":[],"news":[],"references":[{"url":"https://security.paloaltonetworks.com/CVE-2022-0023","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2022-04-13T18:35:10.474000Z","label":"CVE published","source":null},{"type":"cvss_changed","at":"2026-06-28T17:20:25.716557Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:20:25.716557Z","label":"CVSS score revised","source":"cvelistv5"},{"type":"cvss_changed","at":"2026-06-28T17:20:25.716557Z","label":"CVSS score revised","source":"cvelistv5"}]}