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iOS CVE-2026-43797

| EUVDEUVD-2026-49607 MEDIUM
Information Exposure (CWE-200)
2026-07-27 apple GHSA-qmfh-v5vm-w2qv
5.5
CVSS 3.1 · Vendor: apple
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Social engineer user into installing malicious app
  2. Delivery
    Local app execution on device
  3. Exploit
    Exploit improper contacts access checks
  4. Execution
    Read contacts database
  5. Impact
    Exfiltrate contact information

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V14 - Data Protection Data exposure prevention
MITRE ATT&CK

2 techniques across 2 tactics: Collection, Discovery

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

Exploitation Conditions

The attacker must have the ability to deliver and run a malicious app on the victim's device. The user must install and open the app (user interaction required). No special device configuration is needed. Exploitation is limited to local, unauthenticated app execution, meaning the app has no network-based attack vector and requires user cooperation.

Impact

The CVSS 5.5 (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N) indicates medium severity with a high confidentiality impact but limited by the need for local access and user interaction. EPSS places the exploitation probability at 0.15% (5th percentile), which is low. There is no KEV listing and no mention of public exploit code. The SSVC decision suggests a low priority for most organizations because the attack is not automatable (requires user interaction) and the technical impact is restricted to information disclosure. These signals consistently point to a low real-world risk, despite the moderate CVSS score.

Exploit ScenarioDerived

An attacker crafts a malicious app and tricks a user into installing it (e.g., via social engineering). Once installed and run locally, the app exploits the improper access checks and silently reads the user's contact list. No special privileges are needed; the attack succeeds if the user clicks to run the app.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Jul 28, 2026

Information disclosure in Apple iOS, iPadOS, and macOS Tahoe allows a malicious app with local access to read a user's contacts database. The flaw is fixed in iOS 26.6, iPadOS 26.6, and macOS Tahoe 26.6. No public exploit or active exploitation has been reported, and the EPSS score (0.15%) indicates low exploitation likelihood.

RemediationAI

Update to the patched versions: iOS 26.6, iPadOS 26.6, or macOS Tahoe 26.6. No workarounds are available; the primary mitigation is to install the vendor-released updates. Adhere to best practices by only installing trusted apps from the official App Store. Advisory links: https://support.apple.com/en-us/128066 (iOS/iPadOS) and https://support.apple.com/en-us/128067 (macOS).

Affected VersionsENISA

macOS 0 <26.6
iOS and iPadOS 0 <26.6

Affected Packages

euvd ios_and_ipados fix: 26.6
euvd macos fix: 26.6

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 2 packages in euvd

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

Technical ContextAI · show details

The vulnerability resides in the contacts database access controls on Apple operating systems (iOS, iPadOS, macOS Tahoe). Classified as CWE-200 (Exposure of Sensitive Information), the root cause is improper validation of app-level access to the user's address book. Affected versions include iOS and iPadOS versions prior to 26.6 and macOS Tahoe versions prior to 26.6, as indicated by the CPE strings cpe:2.3:a:apple:ios_and_ipados and cpe:2.3:a:apple:macos. The attack surface is local, requiring an app to execute on the device.

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Severity by source

Vendor (apple) PRIMARY 5.5 MEDIUM
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
vuln.today AI 5.5 MEDIUM

Requires local app execution and user interaction, so AV:L and UI:R; no privileges needed, so PR:N.

3.1 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
4.0 AV:L/AC:L/AT:N/PR:N/UI:R/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (apple).

CVSS VectorVendor: apple

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

Lifecycle Timeline

4
CVSS changed
Jul 28, 2026 - 17:22 NVD
5.5 (MEDIUM)
Patch available
Jul 27, 2026 - 21:17 EUVD
CVE Published
Jul 27, 2026 - 20:11 cve.org
UNKNOWN (no severity yet)
CVE Published
Jul 27, 2026 - 20:11 cve.org
MEDIUM 5.5

DescriptionCVE.org

This issue was addressed with improved checks. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Tahoe 26.6. An app may be able to access information about a user's contacts.

Threat Intelligence Overview

EPSS Score
0.2%
Top 95% exploitable
Prevalence
Ubiquitous
iOS is the most widely used mobile OS globally
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 0.2%
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
Small
Automatable
No
Human Impact· derived
High
Technical Impact
Partial

Priority Score

28
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +28
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.

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