What is the CVSS score of CVE-2026-39874?

CVE-2026-39874 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Apple CVE-2026-39874

Q: Which versions of Apple are affected by CVE-2026-39874?

Apple macOS users face a local privilege escalation risk due to incorrect default permissions.. A patch is available.

Q: How to fix or mitigate CVE-2026-39874?

Within 24 hours, apply the latest macOS security update provided by Apple for this CVE. Over the next 7 days, verify that all macOS systems in the organization have received and installed the update, using centralized patch management tools. Within 30 days, review and enhance patch management procedures to ensure faster deployment of critical security patches in the future.

EUVD-2026-49552 HIGH

Incorrect Default Permissions (CWE-276)

2026-07-27 apple

GHSA-6wgf-59x8-7q38

Privilege Escalation Apple

7.8

CVSS 3.1 · Vendor: apple

View

Vulnerability Assessment

Weakness

CWE

CWE-276

OWASP Top 10:2025

A01:2025 - Broken Access Control

ASVS 5.0

V13 - Configuration Default permission hardening

MITRE ATT&CK

1 technique across 1 tactic: Privilege Escalation

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

Patch available 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Jul 27, 2026

Local privilege escalation in Apple macOS due to incorrect default permissions (C

Affected VersionsENISA

macOS 0 <14.8.8

macOS 0 <15.7.8

macOS 0 <26.6

Affected Packages

euvd macos fix: 14.8.8, 15.7.8, 26.6

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (apple) PRIMARY 7.8 HIGH

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from Vendor (apple) · only source for this CVE.

CVSS VectorVendor: apple

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Patch available

Jul 27, 2026 - 21:17 EUVD

CVE Published

Jul 27, 2026 - 20:13 cve.org

HIGH 7.8

CVE Published

Jul 27, 2026 - 20:13 cve.org

UNKNOWN (no severity yet)

DescriptionCVE.org

A permissions issue was addressed with additional restrictions. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. A malicious app may be able to gain root privileges.

Executive ViewAI

Why It Matters

Apple macOS users face a local privilege escalation risk due to incorrect default permissions. A malicious actor with local access could exploit this vulnerability to gain elevated system privileges, potentially compromising sensitive data or taking full control of the affected device. Immediate patching is critical to mitigate this security gap.

Recommended Action

Within 24 hours, apply the latest macOS security update provided by Apple for this CVE. Over the next 7 days, verify that all macOS systems in the organization have received and installed the update, using centralized patch management tools. Within 30 days, review and enhance patch management procedures to ensure faster deployment of critical security patches in the future.

Business Impact: High

Compensating Controls

Apply vendor patch.

Threat Intelligence Overview

EPSS Score

0.1%

Top 99% exploitable

Data Quality

5 sources

Confidence: Medium

EUVD

NVD

CVE.org

EPSS

Vulnrichment

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC No

EPSS 0.1%

Patch available Yes

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision

Scheduled

Exploitation

None

System Exposure· derived

Small

Automatable

Human Impact

High

Technical Impact

Total

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +39

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Privilege Escalation HIGH

Privilege escalation occurs when an attacker leverages flaws in access control mechanisms to gain permissions beyond what they were originally granted.