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iOS and iPadOS EUVDEUVD-2026-65742

| CVE-2026-65367 MEDIUM
NULL Pointer Dereference (CWE-476)
2026-08-25 apple GHSA-q38r-whc2-r472
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
    Distribute malicious app to target device
  2. Delivery
    User installs and launches app
  3. Exploit
    App submits crafted input to vulnerable system API
  4. Execution
    Null pointer dereference occurs in system process
  5. Impact
    Unexpected system termination (device reboot)

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A10:2025 - Mishandling of Exceptional Conditions
ASVS 5.0
V16 - Security Logging and Error Handling Null pointer safety, defensive checks
MITRE ATT&CK

1 technique across 1 tactic: Impact

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

Exploitation Conditions

Exploitation requires a malicious or crafted application to be installed and executed on the target device with at minimum a low-privilege user context (consistent with CVSS PR:L). The attack vector is local (AV:L), meaning the app must run on the device itself - remote unauthenticated exploitation is not possible. No special iOS configuration, entitlement, or enabled feature is identified as a prerequisite beyond standard app execution. Factors that limit exploitation: the attacker must get the target user to install the application (App Store review, MDM restrictions, or user sideloading gatekeeping all act as friction); the impact is limited to device availability (crash/reboot) with no data exfiltration or persistence; and the attack is rated not automatable by SSVC, meaning mass exploitation campaigns are unlikely.

Impact

The composite risk picture is consistently low-to-moderate. CVSS 3.1 scores this at 5.5 (Medium) with a local attack vector (AV:L), low complexity (AC:L), low privilege requirement (PR:L), and availability-only impact (A:H, C:N, I:N) - meaning exploitation causes a crash but no data exposure or integrity compromise. EPSS at 0.10% (1st percentile) signals near-negligible observed or predicted exploitation activity. SSVC corroborates: exploitation is rated 'none,' the attack is not automatable, and technical impact is only 'partial.' There is no KEV listing and no public proof-of-concept. The primary real-world risk is a malicious or buggy app causing a denial-of-service condition (device reboot), which, while disruptive, is fully self-contained and leaves no persistent compromise. No CVSS/description conflict is detected - local vector is consistent with an app-level trigger. Overall: genuine but low-urgency patching candidate; not a priority for emergency deployment windows.

Exploit ScenarioDerived

An attacker distributes a malicious app (or trojanizes a legitimate app) that, when executed on a vulnerable iPhone or iPad, submits crafted input designed to produce a null pointer in a system-level API handler. The null dereference causes the affected system process to crash, triggering an unexpected device reboot. No public proof-of-concept exploit exists at time of analysis, and the local execution requirement limits this to scenarios where the attacker can induce the target to install and run the malicious application.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Aug 26, 2026

Null pointer dereference in iOS and iPadOS allows a locally installed app to trigger unexpected system termination (device crash/reboot) by supplying crafted input that bypasses input validation. Affected versions span the legacy 18.x branch (prior to 18.7.9) and the current 26.x branch (prior to 26.5), covering a broad swath of Apple mobile devices. No active exploitation has been identified - CISA KEV status is absent, SSVC rates exploitation as none, and EPSS sits at the 1st percentile - placing this squarely as a patch-cycle priority rather than an emergency response item.

RemediationAI

The primary fix is to upgrade to iOS 18.7.9 or iPadOS 18.7.9 (for devices on the 18.x branch) or to iOS 26.5 or iPadOS 26.5 (for devices on the 26.x branch), both available via Settings > General > Software Update. Advisory references are https://support.apple.com/en-us/127110 and https://support.apple.com/en-us/127111. For managed enterprise fleets using MDM, administrators should enforce the minimum OS version policy to these releases. If immediate upgrade is not feasible, restricting installation of untrusted third-party apps via MDM App Store policies reduces exposure, since the attack requires a locally running app; note that this workaround does not protect against exploitation by apps already present on the device and introduces usability trade-offs for end users.

Affected VersionsENISA

iOS and iPadOS 0 <18.7.9
iOS and iPadOS 0 <26.5

Affected Packages

euvd ios_and_ipados fix: 18.7.9, 26.5

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

CWE-476 (NULL Pointer Dereference) describes a root cause where code dereferences a pointer without first verifying it is non-null, causing a memory access violation and process or kernel crash. The affected product, identified by CPE cpe:2.3:a:apple:ios_and_ipados:*:*:*:*:*:*:*:*, is Apple's mobile operating system shared between iPhone and iPad device families. Apple's advisory notes the fix was implemented via 'improved input validation,' indicating the vulnerable code path failed to sanitize or check attacker-controlled or untrusted input before using a derived pointer. The CVSS vector (AV:L) indicates the vulnerable component is accessible from a locally executing app context, consistent with a user-installed application passing crafted data to a system API or daemon that fails to handle a null-result edge case.

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Severity by source

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

Local app execution with low privileges is sufficient to trigger the crash; impact is availability-only with no confidentiality or integrity effect, matching the denial-of-service description.

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

Primary rating from Vendor (apple).

CVSS VectorVendor: apple

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

Lifecycle Timeline

4
CVSS changed
Aug 26, 2026 - 16:52 NVD
5.5 (None) 5.5 (MEDIUM)
Patch available
Aug 25, 2026 - 21:04 EUVD
CVE Published
Aug 25, 2026 - 19:24 cve.org
UNKNOWN (no severity yet)
CVE Published
Aug 25, 2026 - 19:24 cve.org
MEDIUM 5.5

DescriptionCVE.org

A null pointer dereference was addressed with improved input validation. This issue is fixed in iOS 18.7.9 and iPadOS 18.7.9, iOS 26.5 and iPadOS 26.5. An app may be able to cause unexpected system termination.

Threat Intelligence Overview

EPSS Score
0.1%
Top 99% exploitable
Prevalence
Ubiquitous
iOS and iPadOS run on billions of active Apple mobile devices 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 0.1%
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

A null pointer dereference occurs when a program attempts to access memory through a pointer that has been set to NULL (address 0x0).

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