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CVE-2026-86573

Status: DeferredMedium (5.1)—
Severity5.1Medium · CVSS 3.1
Exploitation probability0.13 %higher than 3% of CVEs
Active exploitationNonot in the CISA catalog
Public exploitNot knownno public code found

Out-of-bounds write vulnerability in Hitachi Disk Array Driver for AIX and Hitachi Disk Array Driver for Virtual I/O Server.

This issue affects Hitachi Disk Array Driver for AIX: from 01-00 before 01-23-/A; Hitachi Disk Array Driver for Virtual I/O Server: from 01-04 before 01-23-/A.

CVSS

Base score
5.1
Version
3.1
Vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days
0.13 %
Percentile among all scored CVEs
3
Score date
10/20/2026

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).

ATT&CK techniques

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

El vector CVSS es AV:L/UI:N (acceso local sin interacción), lo que apunta a T1068. La descripción solo indica una escritura fuera de límites (CWE-787) y no nombra ejecución de comandos ni otro impacto concreto.

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

Threat Intelligence ProgramExecution PreventionApplication Isolation and SandboxingExploit ProtectionUpdate Software

Affected technologies (2)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Hitachi — Disk Array Driver FOR AIXAIHitachi — Disk Array Driver FOR Virtual I/O ServerAI

CWEs

References

Show 1 references

Raw JSON (NVD)

Show
{
  "id": "CVE-2026-86573",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-86573",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-10-18T13:28:56.196323Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "hirt@hitachi.co.jp",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.1,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H",
          "integrityImpact": "LOW",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 4.2,
        "exploitabilityScore": 0.8
      }
    ]
  },
  "affected": [
    {
      "source": "hirt@hitachi.co.jp",
      "affectedData": [
        {
          "vendor": "Hitachi",
          "product": "Hitachi Disk Array Driver for AIX",
          "versions": [
            {
              "status": "affected",
              "changes": [
                {
                  "at": "01-23-/A",
                  "status": "unaffected"
                }
              ],
              "version": "01-00",
              "lessThan": "01-23-/A",
              "versionType": "custom"
            }
          ],
          "defaultStatus": "unaffected"
        },
        {
          "vendor": "Hitachi",
          "product": "Hitachi Disk Array Driver for Virtual I/O Server",
          "versions": [
            {
              "status": "affected",
              "changes": [
                {
                  "at": "01-23-/A",
                  "status": "unaffected"
                }
              ],
              "version": "01-04",
              "lessThan": "01-23-/A",
              "versionType": "custom"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-10-14T02:17:01.147",
  "references": [
    {
      "url": "https://www.hitachi.com/products/it/software/security/info/vuls/hitachi-sec-2026-137/index.html",
      "source": "hirt@hitachi.co.jp"
    }
  ],
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "hirt@hitachi.co.jp",
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Out-of-bounds write vulnerability in Hitachi Disk Array Driver for AIX and Hitachi Disk Array Driver for Virtual I/O Server.\n\nThis issue affects Hitachi Disk Array Driver for AIX: from 01-00 before 01-23-/A; Hitachi Disk Array Driver for Virtual I/O Server: from 01-04 before 01-23-/A."
    }
  ],
  "lastModified": "2026-10-18T14:16:57.033",
  "sourceIdentifier": "hirt@hitachi.co.jp"
}