{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-20343","assignerOrgId":"d1c1063e-7a18-46af-9102-31f8928bc633","state":"PUBLISHED","assignerShortName":"cisco","dateReserved":"2025-10-08T11:59:15.413Z","datePublished":"2026-09-16T20:12:19.940Z","dateUpdated":"2026-09-18T14:46:28.683Z"},"containers":{"cna":{"title":"Cisco Secure Firewall Management Center Software Information Disclosure and Disk Denial of Service Vulnerability","metrics":[{"format":"cvssV3_1","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}}],"descriptions":[{"lang":"en","value":"A vulnerability in a critical API for Cisco Secure FMC Software could allow an unauthenticated, remote attacker to download sensitive files and use unbounded disk space.\r\n\r\nThis vulnerability exists because a critical API lacks authentication. An attacker could exploit this vulnerability by repeatedly invoking the API. A successful exploit could allow the attacker to download sensitive files that should be restricted and consume disk space so the device could become unresponsive, causing a DoS condition."}],"references":[{"url":"https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-mulivulns-4PsnFwvx","name":"cisco-sa-fmc-mulivulns-4PsnFwvx"}],"exploits":[{"lang":"en","value":"The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory."}],"source":{"advisory":"cisco-sa-fmc-mulivulns-4PsnFwvx","discovery":"INTERNAL","defects":["CSCwu36643"]},"problemTypes":[{"descriptions":[{"lang":"en","description":"Missing Authentication for Critical Function","type":"cwe","cweId":"CWE-306"}]}],"affected":[{"vendor":"Cisco","product":"Cisco Secure Firewall Management Center (FMC)","versions":[{"version":"7.3.0","status":"affected"},{"version":"7.3.1","status":"affected"},{"version":"7.3.1.1","status":"affected"},{"version":"7.4.0","status":"affected"},{"version":"7.4.1","status":"affected"},{"version":"7.4.1.1","status":"affected"},{"version":"7.3.1.2","status":"affected"},{"version":"7.6.0","status":"affected"},{"version":"7.4.2","status":"affected"},{"version":"7.4.2.1","status":"affected"},{"version":"7.7.0","status":"affected"},{"version":"7.4.2.2","status":"affected"},{"version":"7.6.1","status":"affected"},{"version":"7.4.2.3","status":"affected"},{"version":"7.6.2","status":"affected"},{"version":"7.7.10","status":"affected"},{"version":"7.6.2.1","status":"affected"},{"version":"7.7.10.1","status":"affected"},{"version":"7.4.2.4","status":"affected"},{"version":"7.4.3","status":"affected"},{"version":"7.6.3","status":"affected"},{"version":"7.7.11","status":"affected"},{"version":"7.6.4","status":"affected"},{"version":"10.0.0","status":"affected"},{"version":"7.4.4","status":"affected"},{"version":"7.4.5","status":"affected"},{"version":"7.7.12","status":"affected"},{"version":"7.6.5","status":"affected"},{"version":"7.4.6","status":"affected"},{"version":"10.0.1","status":"affected"},{"version":"7.4.7","status":"affected"}],"defaultStatus":"unknown"}],"providerMetadata":{"orgId":"d1c1063e-7a18-46af-9102-31f8928bc633","shortName":"cisco","dateUpdated":"2026-09-16T20:12:19.940Z"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-18T14:39:35.675985Z","id":"CVE-2026-20343","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-18T14:46:28.683Z"}}]}}