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

Source: https://junglewise.ai/threats/cve-2026-86879-apple-ios-and-ipados-input-validation-denial-of-service  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-14. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

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](https://junglewise.ai/threats/technologies/ipados), [Apple Iphone Os](https://junglewise.ai/threats/technologies/iphone-os). Vendors: [Apple](https://junglewise.ai/threats/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

- [https://support.apple.com/en-us/149034](https://support.apple.com/en-us/149034)

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