CVE-2026-86981

Status: Awaiting AnalysisMedium (5.5)—

Severity5.5Medium · CVSS 3.1

Exploitation probability0.14 %higher than 3% of CVEs

Active exploitationNonot in the CISA catalog

Public exploitNot knownno public code found

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.8, macOS Tahoe 26.7. An app may be able to cause unexpected system termination.

CVSS

Base score: 5.5
Version: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.14 %
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.

ExploitationT1068 Exploitation for Privilege Escalationprivilege escalation90 %
Primary impactT1499 Endpoint Denial of Serviceimpact80 %

Vector AV:L/PR:L/UI:N indica explotación local sin interacción (T1068); la descripción dice que una app puede causar la terminación inesperada del sistema, lo que encaja con DoS de endpoint (T1499).

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 Filter Network Traffic Execution Prevention Application Isolation and Sandboxing Exploit Protection Update Software

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-787

References

Show 2 references

Raw JSON (NVD)

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{
  "id": "CVE-2026-86981",
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          "id": "CVE-2026-86981",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-10-20T10:11:41.422786Z"
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    "cvssMetricV31": [
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          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
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        "exploitabilityScore": 1.8
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  "affected": [
    {
      "source": "product-security@apple.com",
      "affectedData": [
        {
          "vendor": "Apple",
          "product": "macOS",
          "versions": [
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  "published": "2026-10-20T01:17:29.540",
  "references": [
    {
      "url": "https://support.apple.com/en-us/149042",
      "source": "product-security@apple.com"
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    {
      "url": "https://support.apple.com/en-us/149043",
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  "lastModified": "2026-10-20T15:03:59.857",
  "sourceIdentifier": "product-security@apple.com"
}