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CVE-2026-18556

Estado: AnalizadaAlta (8.2)⚠ Explotación activa

Authentication bypass using an alternate path or channel vulnerability in N-able N-central allows Authentication Bypass.

This issue affects N-central: through 2026.1.

CVSS

Probabilidad de explotación (EPSS)

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

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

CWE-288 (autenticación débil) en aplicación web expuesta (AV:N, sin privilegios) permite bypass de autenticación. Pista confirma T1190 e impacto en acceso (T1078).

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

Privileged Account ManagementApplication Developer GuidanceActive Directory ConfigurationVulnerability ScanningUser TrainingUser Account Management

Tecnologías afectadas (1)

N-able — N-central

CWE

Referencias

JSON original (NVD)

Mostrar
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  "id": "CVE-2026-18556",
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          "id": "CVE-2026-18556",
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          "options": [
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        "type": "Secondary",
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          "integrityRequirement": "NOT_DEFINED",
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          "vulnAvailabilityImpact": "NONE",
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          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
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      "affectedData": [
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              "version": "0",
              "versionType": "custom",
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  ],
  "published": "2026-08-01T20:16:37.157",
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      "url": "https://uptime.n-able.com/",
      "tags": [
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      "source": "a5532a13-c4dd-4202-bef1-e0b8f2f8d12b"
    },
    {
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-18556",
      "tags": [
        "US Government Resource"
      ],
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    },
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      "url": "https://www.n-able.com/blog/n-central-security-update-august-2-2026",
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      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
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  "vulnStatus": "Analyzed",
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        }
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    {
      "lang": "en",
      "value": "Authentication bypass using an alternate path or channel vulnerability in N-able N-central allows Authentication Bypass.\n\nThis issue affects N-central: through 2026.1."
    }
  ],
  "lastModified": "2026-08-05T05:16:46.967",
  "cisaActionDue": "2026-08-07",
  "cisaExploitAdd": "2026-08-04",
  "configurations": [
    {
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        {
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          "cpeMatch": [
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              "criteria": "cpe:2.3:a:n-able:n-central:*:*:*:*:*:*:*:*",
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  "sourceIdentifier": "a5532a13-c4dd-4202-bef1-e0b8f2f8d12b",
  "cisaRequiredAction": "Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.",
  "cisaVulnerabilityName": "N-able N-central Authentication Bypass Using an Alternate Path or Channel Vulnerability"
}