CVE-2026-20588

Status: Awaiting AnalysisMedium (6.7)—

In mtee, there is a possible escalation of privilege due to a missing bounds check. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS11383899; Issue ID: MSV-9607.

CVSS

Version: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Base score: 6.7

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.11%
Percentile among all scored CVEs: 1
Score date: 10/6/2026

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.

ExploitationT1068 Exploitation for Privilege Escalationprivilege escalation95 %
Primary impactT1059 Command and Scripting Interpreterexecution85 %
Secondary impactT1548 Abuse Elevation Control Mechanismprivilege escalation75 %

AV:L, PR:H y CWE-787 (buffer overflow) indican escalada local desde privilegios de sistema. El buffer overflow permite ejecución de código arbitrario y elevación a root/máximo privilegio.

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

Execution Prevention Privileged Account Management Audit Update Software User Account Management Threat Intelligence Program

Affected technologies (1)

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

Mediatek — Mtee^AI

CWEs

CWE-787

References

https://www.mediatek.com/product-security-bulletin/October-2026

Raw JSON (NVD)

Show

{
  "id": "CVE-2026-20588",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-20588",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-10-05T00:00:00+00:00"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 6.7,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "HIGH"
        },
        "impactScore": 5.9,
        "exploitabilityScore": 0.8
      }
    ]
  },
  "affected": [
    {
      "source": "security@mediatek.com",
      "affectedData": [
        {
          "vendor": "MediaTek, Inc.",
          "product": "MediaTek chipset",
          "versions": [
            {
              "status": "affected",
              "version": "MT2718"
            },
            {
              "status": "affected",
              "version": "MT6768"
            },
            {
              "status": "affected",
              "version": "MT6769"
            },
            {
              "status": "affected",
              "version": "MT6789"
            },
            {
              "status": "affected",
              "version": "MT6833"
            },
            {
              "status": "affected",
              "version": "MT6855"
            },
            {
              "status": "affected",
              "version": "MT6877"
            },
            {
              "status": "affected",
              "version": "MT8186"
            },
            {
              "status": "affected",
              "version": "MT8188"
            },
            {
              "status": "affected",
              "version": "MT8189"
            },
            {
              "status": "affected",
              "version": "MT8195"
            },
            {
              "status": "affected",
              "version": "MT8196"
            },
            {
              "status": "affected",
              "version": "MT8367"
            },
            {
              "status": "affected",
              "version": "MT8391"
            },
            {
              "status": "affected",
              "version": "MT8395"
            },
            {
              "status": "affected",
              "version": "MT8668"
            },
            {
              "status": "affected",
              "version": "MT8676"
            },
            {
              "status": "affected",
              "version": "MT8678"
            },
            {
              "status": "affected",
              "version": "MT8696"
            },
            {
              "status": "affected",
              "version": "MT8781"
            },
            {
              "status": "affected",
              "version": "MT8788E"
            },
            {
              "status": "affected",
              "version": "MT8792"
            },
            {
              "status": "affected",
              "version": "MT8793"
            },
            {
              "status": "affected",
              "version": "MT8799"
            },
            {
              "status": "affected",
              "version": "MT8910"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-10-05T02:16:54.033",
  "references": [
    {
      "url": "https://www.mediatek.com/product-security-bulletin/October-2026",
      "source": "security@mediatek.com"
    }
  ],
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "security@mediatek.com",
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In mtee, there is a possible escalation of privilege due to a missing bounds check. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: ALPS11383899; Issue ID: MSV-9607."
    }
  ],
  "lastModified": "2026-10-06T15:05:34.080",
  "sourceIdentifier": "security@mediatek.com"
}