CVE-2024-20439
A vulnerability in Cisco Smart Licensing Utility (CSLU) could allow an unauthenticated, remote attacker to log into an affected system by using a static administrative credential.
This vulnerability is due to an undocumented static user credential for an administrative account. An attacker could exploit this vulnerability by using the static credentials to login to the affected system. A successful exploit could allow the attacker to login to the affected system with administrative rights over the CSLU application API.
CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 9.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 97%
- Percentil entre todas las CVEs puntuadas: 100
- Fecha de la puntuación: 30/9/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
CISA KEV — explotada activamente
- Añadida al catálogo: 31/3/2025
- Plazo de remediación: 21/4/2025
- Uso conocido en ransomware: Unknown
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1190Exploit Public-Facing Applicationinitial access95 % - Impacto principal
T1078.001Default Accountsstealth · persistence · privilege escalation · initial access90 % - Impacto secundario
T1059Command and Scripting Interpreterexecution75 %
Vulnerabilidad remota sin autenticación (AV:N, PR:N) que permite login con credenciales estáticas administrativas en CSLU, otorgando acceso e.g. ejecutar comandos via API.
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (1)
CWE
- CWE-912
- CWE-798
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2024-20439",
"cveTags": [],
"metrics": {
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2024-20439",
"role": "CISA Coordinator",
"options": [
{
"exploitation": "active"
},
{
"automatable": "yes"
},
{
"technicalImpact": "total"
}
],
"version": "2.0.3",
"timestamp": "2025-03-31T18:12:06.667412Z"
}
}
],
"cvssMetricV31": [
{
"type": "Secondary",
"source": "psirt@cisco.com",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 9.8,
"attackVector": "NETWORK",
"baseSeverity": "CRITICAL",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.9,
"exploitabilityScore": 3.9
},
{
"type": "Primary",
"source": "nvd@nist.gov",
"cvssData": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 9.8,
"attackVector": "NETWORK",
"baseSeverity": "CRITICAL",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"integrityImpact": "HIGH",
"userInteraction": "NONE",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "HIGH"
},
"impactScore": 5.9,
"exploitabilityScore": 3.9
}
]
},
"affected": [
{
"source": "psirt@cisco.com",
"affectedData": [
{
"vendor": "Cisco",
"product": "Cisco Smart License Utility",
"versions": [
{
"status": "affected",
"version": "2.1.0"
},
{
"status": "affected",
"version": "2.0.0"
},
{
"status": "affected",
"version": "2.2.0"
}
]
}
]
},
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"affectedData": [
{
"cpes": [
"cpe:2.3:a:cisco:cisco_smart_license_utility:*:*:*:*:*:*:*:*"
],
"vendor": "cisco",
"product": "cisco_smart_license_utility",
"versions": [
{
"status": "affected",
"version": "2.1.0"
},
{
"status": "affected",
"version": "2.0.0"
},
{
"status": "affected",
"version": "2.2.0"
}
],
"defaultStatus": "unknown"
},
{
"cpes": [
"cpe:2.3:a:cisco:cisco_smart_license_utility:*:*:*:*:*:*:*:*"
],
"vendor": "cisco",
"product": "cisco_smart_license_utility",
"versions": [
{
"status": "affected",
"version": "2.1.0"
},
{
"status": "affected",
"version": "2.0.0"
},
{
"status": "affected",
"version": "2.2.0"
}
],
"defaultStatus": "unknown"
},
{
"cpes": [
"cpe:2.3:a:cisco:cisco_smart_license_utility:*:*:*:*:*:*:*:*"
],
"vendor": "cisco",
"product": "cisco_smart_license_utility",
"versions": [
{
"status": "affected",
"version": "2.1.0"
},
{
"status": "affected",
"version": "2.0.0"
},
{
"status": "affected",
"version": "2.2.0"
}
],
"defaultStatus": "unknown"
}
]
}
],
"published": "2024-09-04T17:15:13.210",
"references": [
{
"url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cslu-7gHMzWmw",
"tags": [
"Vendor Advisory"
],
"source": "psirt@cisco.com"
},
{
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-20439",
"tags": [
"US Government Resource"
],
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
}
],
"vulnStatus": "Analyzed",
"weaknesses": [
{
"type": "Secondary",
"source": "psirt@cisco.com",
"description": [
{
"lang": "en",
"value": "CWE-912"
}
]
},
{
"type": "Primary",
"source": "nvd@nist.gov",
"description": [
{
"lang": "en",
"value": "CWE-798"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "A vulnerability in Cisco Smart Licensing Utility (CSLU) could allow an unauthenticated, remote attacker to log into an affected system by using a static administrative credential.\r\n\r This vulnerability is due to an undocumented static user credential for an administrative account. An attacker could exploit this vulnerability by using the static credentials to login to the affected system. A successful exploit could allow the attacker to login to the affected system with administrative rights over the CSLU application API."
},
{
"lang": "es",
"value": "Una vulnerabilidad en Cisco Smart Licensing Utility podría permitir que un atacante remoto no autenticado inicie sesión en un sistema afectado mediante una credencial administrativa estática. Esta vulnerabilidad se debe a una credencial de usuario estática no documentada para una cuenta administrativa. Un atacante podría aprovechar esta vulnerabilidad mediante el uso de las credenciales estáticas para iniciar sesión en el sistema afectado. Una explotación exitosa podría permitir que el atacante inicie sesión en el sistema afectado con privilegios administrativos sobre la API de la aplicación Cisco Smart Licensing Utility."
}
],
"lastModified": "2026-06-17T07:07:06.230",
"cisaActionDue": "2025-04-21",
"cisaExploitAdd": "2025-03-31",
"configurations": [
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:cisco:smart_license_utility:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "CDFA4BEC-53FD-4A9C-9C78-4663F1B7528E",
"versionEndExcluding": "2.3.0",
"versionStartIncluding": "2.0.0"
}
],
"operator": "OR"
}
]
}
],
"sourceIdentifier": "psirt@cisco.com",
"cisaRequiredAction": "Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.",
"cisaVulnerabilityName": "Cisco Smart Licensing Utility Static Credential Vulnerability"
}