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CVE-2018-20753

Status: AnalyzedCritical (9.8)⚠ Active exploitation

Kaseya VSA RMM before R9.3 9.3.0.35, R9.4 before 9.4.0.36, and R9.5 before 9.5.0.5 allows unprivileged remote attackers to execute PowerShell payloads on all managed devices. In January 2018, attackers actively exploited this vulnerability in the wild.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

CISA KEV — actively exploited

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

Aplicación expuesta RMM sin autenticación (AV:N,PR:N) permite inyección remota de comandos PowerShell; explotación activa documentada en ransomware validó C:H,I:H,A:H.

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Privileged Account ManagementVulnerability ScanningNetwork SegmentationLimit Access to Resource Over NetworkFilter Network TrafficExecution Prevention

Affected technologies (1)

Kaseya — Virtual System Administrator

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2018-20753",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2018-20753",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "active"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2022-04-14T00:00:00+00:00"
        }
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    ],
    "cvssMetricV2": [
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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          "baseScore": 7.5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
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          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "HIGH",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
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        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
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      },
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  },
  "affected": [
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      "affectedData": [
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          "versions": [
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  ],
  "published": "2019-02-05T06:29:00.593",
  "references": [
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      ],
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    },
    {
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    },
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      "tags": [
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      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-20753",
      "tags": [
        "US Government Resource"
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "source": "nvd@nist.gov",
      "description": [
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          "lang": "en",
          "value": "NVD-CWE-noinfo"
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  ],
  "descriptions": [
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      "value": "Kaseya VSA RMM before R9.3 9.3.0.35, R9.4 before 9.4.0.36, and R9.5 before 9.5.0.5 allows unprivileged remote attackers to execute PowerShell payloads on all managed devices. In January 2018, attackers actively exploited this vulnerability in the wild."
    },
    {
      "lang": "es",
      "value": "Kaseya VSA RMM, en versiones anteriores a la R9.3 9.3.0.35, versiones R4 anteriores a la 9.4.0.36 y en las R9.5 anteriores a la 9.5.0.5, permite a los atacantes remotos sin privilegios ejecutar cargas útiles PowerShell en todos los dispositivos gestionados. En enero de 2018, los atacantes explotaban esta vulnerabilidad \"in the wild\" de manera activa."
    }
  ],
  "lastModified": "2026-08-13T05:17:18.220",
  "cisaActionDue": "2022-05-04",
  "cisaExploitAdd": "2022-04-13",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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              "criteria": "cpe:2.3:a:kaseya:virtual_system_administrator:*:*:*:*:*:*:*:*",
              "vulnerable": true,
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              "versionEndExcluding": "9.3.0.35",
              "versionStartIncluding": "9.3"
            },
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              "matchCriteriaId": "60635910-DD05-4230-9F28-2B525804F5E6",
              "versionEndExcluding": "9.4.0.36",
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          "operator": "OR"
        }
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  ],
  "sourceIdentifier": "cve@mitre.org",
  "cisaRequiredAction": "Apply updates per vendor instructions.",
  "cisaVulnerabilityName": "Kaseya VSA Remote Code Execution Vulnerability"
}