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vuln-cve/data/2026/20xxx/CVE-2026-20343.json
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{
"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"
}
}
]
}
}