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Ios And Ipados EUVDEUVD-2026-78129

| CVE-2026-84518 MEDIUM
External Control of Critical State Data (CWE-642)
2026-09-14 apple GHSA-fwr4-9mvc-j48j
4.3
CVSS 3.1 · Vendor: apple
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Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A06:2025 - Insecure Design
ASVS 5.0
V14 - Data Protection Critical state data protection
This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.3% exploitation probability (EPSS)

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AnalysisAIv1 – Sep 15, 2026

An information-disclosure flaw in Apple's WebKit-based browser stack lets a malicious website infer which applications a user has installed across Safari, iOS/iPadOS, and macOS. Apple addressed it through improved state management in Safari 27, iOS 27 and iPadOS 27, and macOS Golden Gate 27, so any device still on an earlier release remains exposed. Exploitation requires the victim to visit the attacker's page (CVSS UI:R) and yields only low-confidentiality impact, with no public exploit code and no CISA KEV listing at time of analysis.

Affected VersionsENISA

iOS and iPadOS 0 <27
macOS 0 <27
Safari 0 <27

Affected Packages

euvd ios_and_ipados fix: 27
euvd macos fix: 27
euvd safari fix: 27

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 3 packages in euvd

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (apple) PRIMARY 4.3 MEDIUM
AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

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

CVSS VectorVendor: apple

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

Lifecycle Timeline

4
CVSS changed
Sep 14, 2026 - 23:22 NVD
4.3 (MEDIUM)
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
MEDIUM 4.3

DescriptionCVE.org

This issue was addressed through improved state management. This issue is fixed in Safari 27, iOS 27 and iPadOS 27, macOS Golden Gate 27. A malicious website may be able to determine what apps a user has installed.

Threat Intelligence Overview

EPSS Score
0.3%
Top 82% exploitable
Data Quality
5 sources
Confidence: Medium

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 MEDIUM
CISA KEV No
Public POC No
EPSS 0.3%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
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· derived
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
No
Human Impact· derived
Medium
Technical Impact
Partial

Priority Score

22
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +22
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

CVE-2026-86950 HIGH POC
8.8 Sep 28

Out-of-bounds write in Apple's iOS, iPadOS, and macOS file-parsing code lets remote attackers achieve arbitrary code exe

CVE-2026-43723 HIGH POC
7.8 Jul 27

Local privilege escalation in Apple operating systems allows a malicious app to gain root privileges. The vulnerability,

CVE-2026-28952 HIGH POC
7.5 May 11

Integer overflow in Apple operating systems allows remote unauthenticated attackers to crash devices via maliciously cra

CVE-2026-65414 CRITICAL
9.8 Sep 14

An out-of-bounds write (CWE-787) in Apple's operating system family - iOS/iPadOS, macOS (Sequoia, Tahoe, and Golden Gate

CVE-2026-64771 CRITICAL
9.8 Jul 27

Memory corruption in multiple Apple operating systems allows remote attackers to trigger buffer overflows that may cause

CVE-2026-43803 CRITICAL
9.8 Jul 27

Remote system termination in multiple Apple operating systems (iOS, iPadOS, macOS, tvOS, visionOS, watchOS) can be trigg

CVE-2026-43810 CRITICAL
9.8 Jul 27

Remote memory corruption in the Apple operating-system kernel (shared XNU core across iOS/iPadOS 26.6, macOS Sequoia 15.

CVE-2026-64770 CRITICAL
9.8 Jul 27

Remote code execution in Apple operating systems prior to iOS/iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, ma

CVE-2026-64769 CRITICAL
9.8 Jul 27

Heap-based buffer overflow in Apple iOS, iPadOS, macOS, tvOS, and visionOS allows remote attackers to cause unexpected a

CVE-2026-64774 CRITICAL
9.8 Jul 27

We are tasked to produce a JSON object with specific fields based on a CVE. We must synthesize multiple intelligence sou

CVE-2026-64772 CRITICAL
9.8 Jul 27

Remote code execution in Apple operating systems (iOS, iPadOS, macOS Sequoia, macOS Tahoe, tvOS, visionOS) stems from an

CVE-2026-84561 CRITICAL
9.8 Sep 14

Kernel memory corruption in Apple's operating systems lets an app already running on a device trigger a double free (CWE

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