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MEDIUM severity

CVE-2026-84599 — IOS And IPadOS

MEDIUM

CVE-2026-84599 is a medium-severity (CVSS 4.4) Buffer Overflow vulnerability in Apple iOS and iPadOS. A fix is available — see the affected versions and patch details below.

The issue was addressed with improved memory handling. This issue is fixed in iOS 26.7.2 and iPadOS 26.7.2, iOS 27 and iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe…

Published
Updated
Affected
5 products
Patched
See advisory
Exploits
None indexed
Exploitation data as of Nov 1, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
0.2%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs9th percentile — riskier than 9% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

Description

The issue was addressed with improved memory handling. This issue is fixed in iOS 26.7.2 and iPadOS 26.7.2, iOS 27 and iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7, tvOS 27, visionOS 27, watchOS 27. An app may be able to cause unexpected system termination or corrupt kernel memory.

Affected Products

5 products · 5 configurations
Application
iOS and iPadOSApple
< 26.7.2
2 versions
00
Application
macOSApple
< 15.8
3 versions
000
Application
tvOSApple
< 27
1 version
0
Application
visionOSApple
< 27
1 version
0
Application
watchOSApple
< 27
1 version
0

Detection & mitigation playbook

Vendor / appliance

  1. Detect

    Inventory every Apple iOS and iPadOS deployment and check each version against the affected-products list above.

  2. Fix

    Apply the Apple iOS and iPadOS security patch or hotfix for CVE-2026-84599 on the affected version, following the vendor advisory for your exact build.

  3. Workarounds

    Constrain what reaches the vulnerable code: limit the size and shape of untrusted input, isolate the affected component in a sandboxed or least-privileged process, and enable the platform's memory-safety mitigations (ASLR, stack protector, hardened allocator) so an out-of-bounds access is more likely to fail closed than to be exploitable. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.

Frequently Asked Questions

The issue was addressed with improved memory handling. This issue is fixed in iOS 26.7.2 and iPadOS 26.7.2, iOS 27 and iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7, tvOS 27, visionOS 27, watchOS 27. An app may be able to cause unexpected system termination or corrupt kernel memory.
O3 Security · Runtime Protection

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CVE-2026-84599: IOS And IPadOS (Medium 4.4)