{"schemaVersion":3,"id":"CVE-2021-3063","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"An improper handling of exceptional conditions vulnerability exists in Palo Alto Networks GlobalProtect portal and gateway interfaces that enables an unauthenticated network-based attacker to send specifically crafted traffic to a GlobalProtect interface that causes the service to stop responding. Repeated attempts to send this request result in denial of service to all PAN-OS services by restarting the device and putting it into maintenance mode. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.21; PAN-OS 9.0 versions earlier than PAN-OS 9.0.14-h4; PAN-OS 9.1 versions earlier than PAN-OS 9.1.11-h3; PAN-OS 10.0 versions earlier than PAN-OS 10.0.8-h4; PAN-OS 10.1 versions earlier than PAN-OS 10.1.3. Prisma Access customers are not impacted by this issue.","dates":{"published":"2021-11-10T17:10:29.461Z","modified":"2024-09-16T20:26:42.141Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.5,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":4.3,"severity":"medium","vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00933,"percentile":0.60131,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.00933},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00933,"percentile":0.60131}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00933,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00933,"percentile":0.60131}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-755","name":"Improper Handling of Exceptional Conditions","description":"The product does not handle or incorrectly handles an exceptional condition.","type":"weakness","status":"Incomplete","abstraction":"Class","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/755.html"}],"affected":[{"vendor":"palo alto networks","product":"pan-os","name":"PAN-OS","label":"pan-os","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 8.1, < 8.1.21","noFixRecorded":false,"fixedIn":null},{"text":"≥ 9.0, < 9.0.14-h4","noFixRecorded":false,"fixedIn":null},{"text":"≥ 10.0, < 10.0.8-h4","noFixRecorded":false,"fixedIn":null},{"text":"≥ 10.1, < 10.1.3","noFixRecorded":false,"fixedIn":null},{"text":"≥ 9.1, < 9.1.11-h3","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 8.1, < 8.1.21 | ≥ 9.0, < 9.0.14-h4 | ≥ 10.0, < 10.0.8-h4 | ≥ 10.1, < 10.1.3 | ≥ 9.1, < 9.1.11-h3","eol":{"isEol":null,"eolDate":null,"matchMethod":"alias_exact","cycle":null,"product":{"name":"panos","label":"Palo Alto Networks PAN-OS","category":"os"}},"hubHref":"/vendor/palo_alto_networks/pan-os"},{"vendor":"paloaltonetworks","product":"pan-os","name":"pan-os","label":"pan-os","ecosystem":null,"cpePart":"o","purl":null,"purlType":null,"versions":[{"text":"≥ 8.1.0, < 8.1.21","noFixRecorded":false,"fixedIn":null},{"text":"≥ 9.0.0, ≤ 9.0.14","noFixRecorded":false,"fixedIn":null},{"text":"≥ 9.1.0, ≤ 9.1.11","noFixRecorded":false,"fixedIn":null},{"text":"≥ 10.0.0, ≤ 10.0.8","noFixRecorded":false,"fixedIn":null},{"text":"≥ 10.1.0, < 10.1.3","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 8.1.0, < 8.1.21 | ≥ 9.0.0, ≤ 9.0.14 | ≥ 9.1.0, ≤ 9.1.11 | ≥ 10.0.0, ≤ 10.0.8 | ≥ 10.1.0, < 10.1.3","eol":{"isEol":null,"eolDate":null,"matchMethod":"alias_exact","cycle":null,"product":{"name":"panos","label":"Palo Alto Networks PAN-OS","category":"os"}},"hubHref":"/vendor/paloaltonetworks/pan-os"}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://security.paloaltonetworks.com/CVE-2021-3063","label":"security.paloaltonetworks.com/CVE-2021-3063","hostname":"security.paloaltonetworks.com","tags":["X Refsource MISC","Vendor Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2021-11-10T17:10:29.461Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2024-09-16T20:26:42.141Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":30,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T14:39:08.576Z","stale":false,"partial":false}}