{
  "id": "CVE-2026-0257",
  "url": "https://spydr.io/cve/CVE-2026-0257",
  "published": "2026-05-13T19:17:01.040Z",
  "modified": "2026-06-17T10:10:37.953Z",
  "score": 7.8,
  "severity": "high",
  "cvss_version": "4.0",
  "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:H/SI:H/SA:N/E:A/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:N/R:A/V:D/RE:M/U:Red",
  "score_source": "paloaltonetworks.com",
  "epss": 0.96382,
  "epss_percentile": 0.9988,
  "exploited": true,
  "kev": {
    "added": "2026-05-29",
    "due": "2026-06-01",
    "action": "Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.",
    "ransomware": "Known",
    "name": "Palo Alto Networks PAN-OS Authentication Bypass Vulnerability",
    "notes": "https://security.paloaltonetworks.com/CVE-2026-0257 ; https://nvd.nist.gov/vuln/detail/CVE-2026-0257"
  },
  "ssvc_exploitation": "active",
  "vendors": [
    "Palo Alto Networks",
    "Siemens"
  ],
  "products": [
    "Palo Alto Networks Cloud NGFW",
    "Palo Alto Networks PAN-OS",
    "Palo Alto Networks Prisma Access",
    "Siemens RUGGEDCOM APE1808"
  ],
  "cwes": [
    "CWE-565"
  ],
  "description": "Authentication bypass vulnerabilities in the GlobalProtect portal and gateway of Palo Alto Networks PAN-OS® software allows the attacker to bypass security restrictions and establish an unauthorized VPN connection. Panorama and Cloud NGFW are not impacted by these issues.",
  "status": "Analyzed",
  "score_type": "Secondary",
  "scores": {
    "cvss_v40": 7.8,
    "cvss_v31": 9.1,
    "cvss_v30": null
  },
  "references": [
    {
      "url": "https://security.paloaltonetworks.com/CVE-2026-0257",
      "tags": [
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://cert-portal.siemens.com/productcert/html/ssa-967325.html",
      "tags": [
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-0257",
      "tags": [
        "US Government Resource"
      ]
    }
  ],
  "nvd_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-0257",
  "covered_in": [],
  "attribution": [
    {
      "source": "NVD",
      "url": "https://nvd.nist.gov",
      "notice": "This product uses data from the NVD API but is not endorsed or certified by the NVD."
    },
    {
      "source": "CISA KEV",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "notice": "Known exploited vulnerabilities from the CISA KEV catalog."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss",
      "notice": "Exploit prediction scores from FIRST EPSS."
    }
  ]
}