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iOS and iPadOS EUVDEUVD-2026-77984

| CVE-2026-86878 MEDIUM
Information Exposure (CWE-200)
2026-09-14 apple GHSA-6q49-jwhx-rp35
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
    Trick user into installing malicious app
  2. Delivery
    Launch app with user interaction
  3. Exploit
    Abuse permissions gap to bypass access restrictions
  4. Execution
    Read sensitive user data
  5. Impact
    Exfiltrate collected data

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

Requires a malicious or compromised app already running locally on the device (AV:L, PR:N but app-delivered) plus user interaction (UI:R) - most realistically the user installing and opening the offending app. There is no remote or network-based path. Exploitation is limited by Apple's App Store review and application sandbox, and it is fully remediated by updating to iOS 27 / iPadOS 27; devices on earlier versions (0 <27) are affected. Impact is confined to disclosure of sensitive user data - no integrity or availability effect.

Impact

This is a genuine but low-urgency issue. The CVSS 3.1 vector (AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N, base 5.5 Medium) confirms LOCAL attack vector - exploitation requires code already executing on the device (a malicious or compromised app), not a remote network attacker. Impact is confidentiality-only (C:H, I:N, A:N): unauthorized access to sensitive user data, consistent with CWE-200 and the 'Information Disclosure' tag. Corroborating signals point to low real-world risk: EPSS is 0.17% (7th percentile), there is no CISA KEV listing, and no public exploit has been identified. Note a nuance in the vector: PR:N with UI:R means no elevated privileges are needed but the malicious app is the delivery vehicle and some user interaction is involved - the practical precondition is that the user has installed the offending app (App Store vetting and sandboxing normally mitigate this). No SSVC framework data was provided. Overall this is a real, vendor-confirmed permissions/sandbox weakness worth patching via routine OS update, not an emergency; nothing in the data indicates active or widespread exploitation.

Exploit ScenarioDerived

A user installs a seemingly benign app that abuses a permissions gap to reach sensitive user data it should not be able to read (per the local vector and UI:R). Because the attack requires local app execution rather than remote access, exploitation depends on getting a malicious app onto the device and the user interacting with it. No public exploit code has been identified.

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 – Sep 16, 2026

Information disclosure in Apple iOS and iPadOS versions before 27 allows a locally installed malicious or compromised app to access sensitive user data after the user installs and opens it. The flaw is a permissions issue (CWE-200) that Apple addressed with additional restrictions in iOS 27 and iPadOS 27. No public exploit identified at time of analysis and EPSS is 0.17% (7th percentile), but the CVSS score of 5.5 reflects the high confidentiality impact; exploitation requires local app execution and user interaction, with no remote path.

RemediationAI

Vendor-released patch: iOS 27 and iPadOS 27. Upgrade affected devices via Settings > General > Software Update. There are no known workarounds that fully mitigate the issue; as a compensating control, users should avoid installing apps from untrusted sources, though this does not eliminate the risk from already-installed malicious apps. For detailed instructions, see the Apple advisory at https://support.apple.com/en-us/149034. After updating, no further action is required.

Affected VersionsENISA

iOS and iPadOS 0 <27

Affected Packages

euvd ios_and_ipados fix: 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.

Technical ContextAI · show details

The vulnerability is an information disclosure flaw (CWE-200) in Apple iOS and iPadOS, rooted in insufficient permission restrictions. According to the CPE string cpe:2.3:a:apple:ios_and_ipados:*:*:*:*:*:*:*:*, all versions from 0 up to but not including 27 are affected. The attack vector is local (AV:L) and requires user interaction (UI:R), meaning an attacker must deliver a malicious app that the user installs and opens. No privileges are required (PR:N), but the app runs within Apple's sandbox and App Store review provides some mitigation. The flaw allows an app to bypass intended access controls and read sensitive user data, but it does not affect integrity or availability (I:N/A:N). The fix in iOS 27 and iPadOS 27 adds additional restrictions to close the permission gap.

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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

Local malicious app is the vector (AV:L) needing user interaction (UI:R) but no elevated privileges (PR:N); permissions bypass discloses data (C:H) with no integrity or availability impact.

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:P/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
Sep 16, 2026 - 14:22 NVD
5.5 (MEDIUM)
Patch available
Sep 14, 2026 - 22:19 EUVD
CVE Published
Sep 14, 2026 - 20:47 cve.org
UNKNOWN (no severity yet)
CVE Published
Sep 14, 2026 - 20:47 cve.org
MEDIUM 5.5

DescriptionCVE.org

A permissions issue was addressed with additional restrictions. This issue is fixed in iOS 27 and iPadOS 27. An app may be able to access sensitive user data.

Threat Intelligence Overview

EPSS Score
0.2%
Top 93% exploitable
Prevalence
Ubiquitous
Apple iOS/iPadOS runs on a huge global fraction of consumer mobile devices
Data Quality
4 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· derived
None
System Exposure· derived
Small
Automatable· derived
No
Human Impact· derived
High

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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