The Apple Security Update Review for September 2026
Apple's September 2026 updates patch 45+ flaws, including a 9.8 Screen Sharing authentication bypass (CVE-2026-65400) already listed in CISA's KEV.
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Vulnerability7 · 4 reads
CVE-2026-65414
Out-of-Bounds Write in Apple iOS, iPadOS, macOS Enables Remote Code Execution
- CVSS 3.1
- 9.8 critical
- EPSS
- —
- Published
- ·
- Modified
AI analysisSummaries by Vani AI
Apple patched a critical out-of-bounds write (CWE-787) memory-corruption flaw spanning nearly its entire operating-system lineup: iOS, iPadOS, macOS (Sequoia, Tahoe, Golden Gate), tvOS, visionOS, and watchOS. A remote attacker could trigger the flaw with no privileges and no user interaction (CVSS 3.1: 9.8, network vector, low complexity), causing unexpected app termination or potentially arbitrary code execution on the affected device. The advisory does not identify the vulnerable component or exact trigger, so defenders should assume any affected system is remotely attackable until patched. All users running iOS/iPadOS before 26.7, macOS Sequoia before 15.8, macOS Tahoe before 26.7, or pre-release tvOS/visionOS/watchOS builds older than 27 are affected. No public proof of concept exists, no exploitation in the wild is known, and the flaw is not on CISA's KEV list; fixes shipped in the listed updates.
What to do: Update all Apple devices promptly: iPhones/iPads to iOS/iPadOS 26.7 or 27, Macs to macOS Sequoia 15.8, macOS Tahoe 26.7, or macOS Golden Gate 27, Apple TV to tvOS 27, Apple Watch to watchOS 27, and Vision Pro to visionOS 27. Enable automatic security updates and use MDM/inventory to find devices still on older OS trains. Given the 9.8 CVSS with no user interaction required, treat patching as high priority even though no exploitation has been observed.
| Product | Affected |
|---|---|
| Apple iOS | Prior to iOS 26.7 (26.x and earlier trains); fixed in iOS 26.7 and iOS 27 |
| Apple iPadOS | Prior to iPadOS 26.7 (26.x and earlier trains); fixed in iPadOS 26.7 and iPadOS 27 |
| Apple macOS Sequoia | Prior to 15.8; fixed in 15.8 |
| Apple macOS Tahoe | Prior to 26.7; fixed in 26.7 |
| Apple macOS Golden Gate | Prior to 27; fixed in 27 |
| Apple tvOS | Prior to 27; fixed in 27 |
| Apple visionOS | Prior to 27; fixed in 27 |
| Apple watchOS | Prior to 27; fixed in 27 |
Estimated exposure
masspotentially 1+ billion devices (Apple's ~2.35 billion active-device install base, most on affected OS trains) — Apple has publicly reported more than 2 billion active devices worldwide, and the affected platforms (iPhone, iPad, Mac, Apple TV, Apple Watch, Vision Pro) cover essentially all of them, so the unpatched population plausibly reaches…
Order-of-magnitude estimate by the model from install counts, market share and public scan data it knows; verify before quoting.
Description · NVD
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 26.7 and iPadOS 26.7, iOS 27 and iPadOS 27, macOS Golden Gate 27, macOS Sequoia 15.8, macOS Tahoe 26.7, tvOS 27, visionOS 27, watchOS 27. A remote attacker may be able to cause unexpected app termination or arbitrary code execution.
- Vendors
- apple
- Products
- ipados, iphone os, macos, visionos, watchos
- Weakness
- CWE-787
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
In the news
2 storiesApple Rolls Out Massive Security Update Fixing 273 Vulnerabilities Across Its Devices
Apple's coordinated rollout patches 273 unique vulnerabilities across iOS 27, macOS Golden Gate 27, watchOS and Safari, including remote code execution flaws.
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