What is the CVSS score of EUVD-2026-77938?

EUVD-2026-77938 has a CVSS 3.1 base score of 8.2 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N. EPSS exploitation probability: 0.2%.

Is there a patch available for EUVD-2026-77938?

Yes, a patch is available for EUVD-2026-77938. Update the affected software to the latest version immediately.

Apple EUVD-2026-77938

| CVE-2026-84535 HIGH

Improper Access Control (CWE-284)

2026-09-14 apple

GHSA-77fp-83m2-w745

Authentication Bypass Apple

8.2

CVSS 3.1 · Vendor: apple

View

Vulnerability Assessment

Weakness

CWE

CWE-284

OWASP Top 10:2025

A01:2025 - Broken Access Control

ASVS 5.0

V8 - Authorization Access control enforcement

MITRE ATT&CK

1 technique across 1 tactic: Defense Evasion

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 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Sep 16, 2026

A local sandbox-escape flaw in Apple macOS (CWE-284, improper access control via faulty state management) allows a malicious application to break out of its App Sandbox and operate outside the restricted environment it was granted. Affected versions are macOS Sequoia before 15.8, macOS Tahoe before 26.7, and macOS Golden Gate before 27, with Apple shipping fixes in all three (support.apple.com advisories 149035, 149042, 149043). CVSS 3.1 rates it 8.2 (AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N), but EPSS is only 0.19% (9th percentile), there is no CISA KEV listing, and no public exploit code has been identified at time of analysis — so this is a high-severity, low-current-activity issue whose priority is driven by the App Sandbox being a core macOS security boundary rather than by observed exploitation.

Affected VersionsENISA

macOS 0 <15.8

macOS 0 <27

macOS 0 <26.7

Affected Packages

euvd macos fix: 15.8, 26.7, 27

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 8.2 HIGH

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

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

CVSS VectorVendor: apple

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

High

Integrity

High

Availability

None

Lifecycle Timeline

CVSS changed

Sep 15, 2026 - 19:22 NVD

8.2 (HIGH)

Patch available

Sep 14, 2026 - 22:19 EUVD

CVE Published

Sep 14, 2026 - 20:51 cve.org

UNKNOWN (no severity yet)

CVE Published

Sep 14, 2026 - 20:51 cve.org

HIGH 8.2

DescriptionCVE.org

An authorization issue was addressed with improved state management. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7. An app may be able to break out of its sandbox.

Threat Intelligence Overview

EPSS Score

0.2%

Top 91% exploitable

Data Quality

4 sources

Confidence: Medium

EUVD 🇯🇵JVN

NVD

CVE.org

EPSS

VulDB

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 0.2%

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.