CVE-2026-86879: Apple iOS and iPadOS input validation denial-of-service

CVE-2026-86879 · Severity: medium · CVSS 6.5 · Published 2026-09-14

iOS and iPadOS are Apple's mobile operating systems used by hundreds of millions of users worldwide. A remote attacker can trigger a denial-of-service condition by sending maliciously crafted input, causing the device to become unresponsive or crash. Apple has patched this issue in iOS 27 and iPadOS 27.

Technologies: Apple iPadOS, Apple Iphone Os. Vendors: Apple.

Quick answers

Is CVE-2026-86879 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-86879 being exploited in the wild.
How severe is CVE-2026-86879?
Medium severity, with a CVSS score of 6.5, published 14 September 2026.
Which products and versions are affected?
Apple iPadOS before 27.
Is there a fix for CVE-2026-86879?
A patch was published on 2026-09-14: iOS 27 and iPadOS 27 released Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-86879 attacked?
It is attacked over the network.
Am I affected by CVE-2026-86879?
Check whether you run Apple iPadOS or Apple Iphone Os at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

This is a denial-of-service vulnerability in iOS and iPadOS caused by insufficient input validation. A remote attacker can craft malicious input that bypasses validation checks and triggers unexpected process termination or system instability. The vulnerability is network-reachable and does not require user authentication or device-level privileges. Apple addressed the issue by implementing improved input validation logic in iOS 27 and iPadOS 27, released on September 14, 2026.

Affected products

  • Apple iOS before 27
  • Apple iPadOS before 27

Timeline

  • 2026-09-14: disclosed
  • 2026-09-14: patched: iOS 27 and iPadOS 27 released

References

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