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CVE-2021-3056

Estado: ModificadaAlta (8.8)—

A memory corruption vulnerability in Palo Alto Networks PAN-OS GlobalProtect Clientless VPN enables an authenticated attacker to execute arbitrary code with root user privileges during SAML authentication. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.20; PAN-OS 9.0 versions earlier than PAN-OS 9.0.14; PAN-OS 9.1 versions earlier than PAN-OS 9.1.9; PAN-OS 10.0 versions earlier than PAN-OS 10.0.1. Prisma Access customers with Prisma Access 2.1 Preferred firewalls are impacted by this issue.

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)

Paloaltonetworks — Pan-os

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2021-3056",
  "cveTags": [],
  "metrics": {
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        "source": "nvd@nist.gov",
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          "vectorString": "AV:N/AC:M/Au:S/C:C/I:C/A:C",
          "authentication": "SINGLE",
          "integrityImpact": "COMPLETE",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "COMPLETE",
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        "obtainAllPrivilege": false,
        "exploitabilityScore": 6.8,
        "obtainUserPrivilege": false,
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          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
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          "product": "PAN-OS",
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          "versions": [
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              "version": "2.2 all"
            },
            {
              "status": "affected",
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              "version": "2.1 Innovation"
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  ],
  "published": "2021-11-10T17:15:09.553",
  "references": [
    {
      "url": "https://security.paloaltonetworks.com/CVE-2021-3056",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "psirt@paloaltonetworks.com"
    },
    {
      "url": "https://security.paloaltonetworks.com/CVE-2021-3056",
      "tags": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
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      "source": "psirt@paloaltonetworks.com",
      "description": [
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          "value": "CWE-120"
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    {
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      "source": "nvd@nist.gov",
      "description": [
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          "value": "CWE-787"
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  "descriptions": [
    {
      "lang": "en",
      "value": "A memory corruption vulnerability in Palo Alto Networks PAN-OS GlobalProtect Clientless VPN enables an authenticated attacker to execute arbitrary code with root user privileges during SAML authentication. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.20; PAN-OS 9.0 versions earlier than PAN-OS 9.0.14; PAN-OS 9.1 versions earlier than PAN-OS 9.1.9; PAN-OS 10.0 versions earlier than PAN-OS 10.0.1. Prisma Access customers with Prisma Access 2.1 Preferred firewalls are impacted by this issue."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de corrupción de memoria en Palo Alto Networks PAN-OS GlobalProtect Clientless VPN permite a un atacante autenticado ejecutar código arbitrario con privilegios de usuario root durante la autenticación SAML. Este problema afecta a: PAN-OS versiones 8.1 anteriores a PAN-OS 8.1.20; PAN-OS versiones 9.0 anteriores a PAN-OS 9.0.14; PAN-OS versiones 9.1 anteriores a PAN-OS 9.1.9; PAN-OS versiones 10.0 anteriores a PAN-OS 10.0.1. Los clientes de Prisma Access Prisma Access versión 2.1 con firewall Preferidos están afectados por este problema\n"
    }
  ],
  "lastModified": "2026-06-17T04:04:39.027",
  "configurations": [
    {
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        {
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}