CVE-2026-86907

Status: Awaiting AnalysisMedium (4.4)—

Severity4.4Medium · CVSS 3.1

Exploitation probability0.15 %higher than 4% of CVEs

Active exploitationNonot in the CISA catalog

Public exploitNot knownno public code found

An authorization issue was addressed with improved entitlement checks. This issue is fixed in macOS Sequoia 15.8, macOS Tahoe 26.7. An app with admin privileges may be able to modify the System Keychain.

CVSS

Base score: 4.4
Version: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.15 %
Percentile among all scored CVEs: 4
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.

ExploitationT1068 Exploitation for Privilege Escalationprivilege escalation90 %
Primary impactT1565.001 Stored Data Manipulationimpact55 %

Vector AV:L/UI:N sin interacción, requiere PR:H; el texto dice que una app con privilegios de administrador puede modificar el System Keychain (integridad alta).

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 Program Restrict File and Directory Permissions Remote Data Storage Execution Prevention Encrypt Sensitive Information Application Isolation and Sandboxing

Affected technologies (1)

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

Apple — Macos^AI

CWEs

CWE-862

References

Show 2 references

Raw JSON (NVD)

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{
  "id": "CVE-2026-86907",
  "cveTags": [],
  "metrics": {
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      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-86907",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-10-20T14:52:34.585332Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 4.4,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "NONE",
          "privilegesRequired": "HIGH",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 0.8
      }
    ]
  },
  "affected": [
    {
      "source": "product-security@apple.com",
      "affectedData": [
        {
          "vendor": "Apple",
          "product": "macOS",
          "versions": [
            {
              "status": "affected",
              "version": "0",
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  "published": "2026-10-20T01:17:26.530",
  "references": [
    {
      "url": "https://support.apple.com/en-us/149042",
      "source": "product-security@apple.com"
    },
    {
      "url": "https://support.apple.com/en-us/149043",
      "source": "product-security@apple.com"
    }
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    }
  ],
  "lastModified": "2026-10-20T15:17:34.420",
  "sourceIdentifier": "product-security@apple.com"
}