CVE-2026-86885: Apple iPadOS DOS Vulnerability

CVE-2026-86885 Overview

CVE-2026-86885 is an input validation vulnerability affecting Apple iOS and iPadOS. An attacker within radio range can send malformed input that triggers unexpected system termination on vulnerable devices. Apple addressed the flaw in iOS 27 and iPadOS 27 through improved input validation. The weakness is categorized under [CWE-20] Improper Input Validation and requires no user interaction or authentication to exploit. The attack vector is limited to adjacent networks, meaning the attacker must be within wireless range of the target device. Successful exploitation impacts device availability but does not compromise data confidentiality or integrity.

Critical Impact
An unauthenticated attacker within radio range can cause unexpected system termination on unpatched iPhone and iPad devices, resulting in denial of service.

Affected Products

Apple iOS versions prior to iOS 27
Apple iPadOS versions prior to iPadOS 27
iPhone and iPad devices running vulnerable OS builds

Discovery Timeline

2026-09-14 - CVE-2026-86885 published to the National Vulnerability Database
2026-09-16 - Last updated in NVD database

Technical Details for CVE-2026-86885

Vulnerability Analysis

The vulnerability resides in a wireless-adjacent input handling path within iOS and iPadOS. When the affected component processes malformed data received over a radio interface, insufficient validation allows the input to cause unexpected system termination. The failure produces a denial-of-service condition on the targeted device.

The flaw does not expose device data or allow modification of stored content. Impact is limited to availability, but the low attack complexity and absence of authentication or user interaction lower the barrier for exploitation. Any unauthenticated actor within wireless range can trigger the condition against unpatched devices.

Apple documented the fix in Apple Support Article HT149034. The company resolved the weakness with improved input validation in iOS 27 and iPadOS 27.

Root Cause

The root cause is improper input validation [CWE-20] in a radio-adjacent code path. The affected component accepts external input without sufficient sanity checks on structure, length, or field values. Malformed data reaches downstream logic that does not gracefully handle unexpected states, leading to termination of the system process handling the input.

Attack Vector

Exploitation requires wireless proximity to the target. The attacker transmits crafted frames or packets over a radio interface reachable by an unpatched iPhone or iPad. No credentials, provisioning, or user action are required. The resulting termination disrupts normal device operation until the affected process or the device itself recovers.

No public proof-of-concept, exploit code, or CISA Known Exploited Vulnerabilities listing exists for this issue at the time of writing. The EPSS probability of exploitation is 0.172%.

No verified proof-of-concept code is available. Refer to the Apple Support Article for vendor-provided technical context.

Detection Methods for CVE-2026-86885

Indicators of Compromise

Unexplained device reboots or process crashes on iPhone or iPad hardware, particularly in shared wireless environments
Repeated system termination events correlating with the presence of unknown wireless transmitters in physical proximity
Crash reports referencing the affected radio-adjacent subsystem in iOS or iPadOS diagnostic logs

Detection Strategies

Collect and review iOS and iPadOS crash logs through mobile device management (MDM) telemetry for repeated kernel or daemon terminations
Correlate device unavailability events with location and wireless environment data to identify potential adjacent-network attack patterns
Monitor MDM compliance reports for devices still running iOS or iPadOS versions earlier than 27

Monitoring Recommendations

Enable diagnostic and analytics submission on managed devices to surface repeated unexpected terminations
Track OS version distribution across the mobile fleet and alert on devices lagging behind the iOS 27 and iPadOS 27 baseline
Review wireless intrusion detection alerts in facilities where sensitive iPhone and iPad usage occurs

How to Mitigate CVE-2026-86885

Immediate Actions Required

Update all iPhone devices to iOS 27 and all iPad devices to iPadOS 27 as soon as feasible
Enforce the update through mobile device management policies and set compliance rules to flag noncompliant devices
Prioritize patching for devices used in high-risk physical environments where untrusted parties can approach within wireless range

Patch Information

Apple resolved CVE-2026-86885 in iOS 27 and iPadOS 27 with improved input validation. Update details are available in the Apple Support Article. Devices that cannot receive iOS 27 or iPadOS 27 remain exposed and should be considered for hardware refresh.

Workarounds

Disable non-essential wireless radios on affected devices when operating in untrusted physical environments until patches are applied
Restrict use of unpatched devices to controlled areas where adjacent-network access by unauthorized parties is unlikely
Increase physical security awareness for personnel carrying vulnerable devices in public or shared spaces

bash

# Verify iOS or iPadOS version compliance via MDM query
# Example: check devices reporting OSVersion below 27
mdm-cli query --filter "OSVersion < 27" --platform ios,ipados