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CVE-2021-27899

Estado: ModificadaAlta (7.4)—

The Proofpoint Insider Threat Management Agents (formerly ObserveIT Agent) for MacOS and Linux perform improper validation of the ITM Server's certificate, which enables a remote attacker to intercept and alter these communications using a man-in-the-middle attack. All versions before 7.11.1 are affected. Agents for Windows and Cloud are not affected.

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).

Tecnologías afectadas (1)

Proofpoint — Insider Threat Management

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2021-27899",
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        "source": "nvd@nist.gov",
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          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "PARTIAL"
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        "impactScore": 4.9,
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          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
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  "affected": [
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      "affectedData": [
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  "published": "2021-04-06T21:15:14.457",
  "references": [
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      "tags": [
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      "value": "The Proofpoint Insider Threat Management Agents (formerly ObserveIT Agent) for MacOS and Linux perform improper validation of the ITM Server's certificate, which enables a remote attacker to intercept and alter these communications using a man-in-the-middle attack. All versions before 7.11.1 are affected. Agents for Windows and Cloud are not affected."
    },
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      "value": "Los Agentes Proofpoint Insider Threat Management (anteriormente ObserveIT Agent) para MacOS y Linux llevan a cabo una comprobación inapropiada del certificado del servidor ITM, lo que permite a un atacante remoto interceptar y alterar estas comunicaciones usando un ataque de tipo man-in-the-middle. Todas las versiones anteriores a 7.11.1 están afectadas. Los agentes para Windows y Cloud no están afectados"
    }
  ],
  "lastModified": "2026-06-17T03:45:34.477",
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