{"schema":"threatline.record/2","record":{"id":"CVE-2026-0300","aliases":[],"summary":"Palo Alto Networks PAN-OS Out-of-bounds Write Vulnerability","details":"Palo Alto Networks PAN-OS contains an out-of-bounds write vulnerability in the User-ID Authentication Portal (aka Captive Portal) service that can allow an unauthenticated attacker to execute arbitrary code with root privileges on the PA-Series and VM-Series firewalls by sending specially crafted packets.","categories":["Network & edge"],"product":"PAN-OS","vendor":"Palo Alto Networks","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-0300","source_modified_at":"2026-10-15T01:11:55.163Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Cloud NGFW","vendor":"Palo Alto Networks","versions":[{"status":"unaffected","version":"All","versionType":"custom"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-0300","source_modified_at":"2026-10-15T01:11:55.163Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"PAN-OS","vendor":"Palo Alto Networks","versions":[{"status":"affected","version":"12.1.0","lessThan":"12.1.7","changes":[{"at":"12.1.7","status":"unaffected"},{"at":"12.1.4-h5","status":"unaffected"}],"versionType":"custom"},{"status":"affected","version":"11.2.0","lessThan":"11.2.12","changes":[{"at":"11.2.12","status":"unaffected"},{"at":"11.2.10-h6","status":"unaffected"},{"at":"11.2.7-h13","status":"unaffected"},{"at":"11.2.4-h17","status":"unaffected"}],"versionType":"custom"},{"status":"affected","version":"11.1.0","lessThan":"11.1.15","changes":[{"at":"11.1.15","status":"unaffected"},{"at":"11.1.13-h5","status":"unaffected"},{"at":"11.1.10-h25","status":"unaffected"},{"at":"11.1.7-h6","status":"unaffected"},{"at":"11.1.6-h32","status":"unaffected"},{"at":"11.1.4-h33","status":"unaffected"}],"versionType":"custom"},{"status":"affected","version":"10.2.0","lessThan":"10.2.18-h6","changes":[{"at":"10.2.18-h6","status":"unaffected"},{"at":"10.2.16-h7","status":"unaffected"},{"at":"10.2.13-h21","status":"unaffected"},{"at":"10.2.10-h36","status":"unaffected"},{"at":"10.2.7-h34","status":"unaffected"}],"versionType":"custom"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-0300","source_modified_at":"2026-10-15T01:11:55.163Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Prisma Access","vendor":"Palo Alto Networks","versions":[{"status":"unaffected","version":"All","versionType":"custom"}],"defaultStatus":"unaffected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-0300","source_modified_at":"2026-10-15T01:11:55.163Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"PAN-OS","ecosystem":null},"version":"12.1.7","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-0300","source_modified_at":"2026-10-15T01:11:55.163Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"PAN-OS","ecosystem":null},"version":"11.2.12","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-0300","source_modified_at":"2026-10-15T01:11:55.163Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"PAN-OS","ecosystem":null},"version":"11.1.15","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-0300","source_modified_at":"2026-10-15T01:11:55.163Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"PAN-OS","ecosystem":null},"version":"10.2.18-h6","basis":"first unaffected version stated in the CVE record"}],"cvss":9.3,"severity":"Critical","kev":{"listed":true,"date_added":"2026-05-06","due_date":"2026-05-09","required_action":"Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Until the vendor releases an official fix, the following workaround should be implemented:  - Restrict User-ID Authentication Portal access to only trusted zones.  - Disable User-ID Authentication Portal if not required. 5/13/2026: Palo Alto has released a variety of patches. If these are relevant to your environment, please apply the designated patch.","ransomware_campaign_use":"Unknown"},"epss":{"probability":0.31725,"percentile":0.98301,"score_date":"2026-10-23"},"published_at":"2026-05-06T18:57:39.876Z","modified_at":"2026-10-15T01:11:55.163Z","provenance":[{"source":"CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T17:00:09.9001Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-0300","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-15T01:11:55.163Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-0300","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CISA KEV","CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://security.paloaltonetworks.com/CVE-2026-0300","tags":["vendor-advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-0300","source":"CISA KEV"},{"source":"CVE List","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-0300","tags":["government-resource"]},{"source":"CVE List","url":"https://cert-portal.siemens.com/productcert/html/ssa-967325.html"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"active","automatable":"yes","technical_impact":"total","assessed_at":"2026-05-06T00:00:00+00:00"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-15T01:11:55.163Z","content_hash":"6f845d9550df658d887450a5eaaf4d2667486c29904f1171cabeedd18d8b4fea"}}