What tvOS 26.4 Fixes
tvOS 26.4, released March 24, 2026, fixes 19 vulnerabilities in 15 parts of the system, according to Apple's security advisory.
Apple does not say that any of them were exploited before the fix. That makes tvOS 26.4 a routine security update: worth installing soon, not an emergency.
It has since been superseded: the newest security release for tvOS 26 is tvOS 26.6, from July 27, 2026, which includes these fixes.
| What an attacker could do | Fixes |
|---|---|
| Elevated privileges or sandbox escape | 6 |
| Private data or protections bypassed | 4 |
| Crash or denial of service | 4 |
| Other | 5 |
Grouped by us from the impact Apple gives for each fix; the impact lines below are Apple's own.
Which Devices Get tvOS 26.4
Apple lists tvOS 26.4 for: Apple TV HD and Apple TV 4K (all models).
How to Install tvOS 26.4
On the Apple TV, open Settings → System → Software Updates.
Security fixes are cumulative: any later release for the same version includes these as well, so if you are already past tvOS 26.4 there is nothing to do.
Every Fix in tvOS 26.4
All 19 CVEs in Apple's advisory, the most serious kinds first. Each entry is the part of the system affected, Apple's description of the impact and the fix, and the CVE ID.
-
802.1X
An attacker in a privileged network position may be able to intercept network traffic
An authentication issue was addressed with improved state management.
CVE-2026-28865 -
CoreUtils
A user in a privileged network position may be able to cause a denial-of-service
A null pointer dereference was addressed with improved input validation.
CVE-2026-28886 -
Kernel
An app may be able to cause unexpected system termination or corrupt kernel memory
The issue was addressed with improved memory handling.
CVE-2026-20698 -
Kernel
An app may be able to cause unexpected system termination or write kernel memory
A use after free issue was addressed with improved memory management.
CVE-2026-20687 -
ppp
An attacker may be able to cause unexpected system termination or read kernel memory
The issue was addressed with improved memory handling.
CVE-2026-28896 -
WebKit
A malicious website may be able to process restricted web content outside the sandbox
The issue was addressed with improved memory handling.
CVE-2026-28859 -
curl
An issue existed in curl which may result in unintentionally sending sensitive information via an incorrect connection
This is a vulnerability in open source code and Apple Software is among the affected projects. The CVE-ID was assigned by a third party. Learn more about the issue and CVE-ID at cve.org .
CVE-2025-14524 -
GeoServices
An app may be able to access sensitive user data
An information leakage was addressed with additional validation.
CVE-2026-28870 -
Kernel
An app may be able to leak sensitive kernel state
This issue was addressed with improved authentication.
CVE-2026-28867 -
Security
A local attacker may be able to modify the state of the Keychain
The issue was addressed with improved input validation.
CVE-2026-28860 -
Audio
Processing maliciously crafted web content may lead to an unexpected process crash
A use-after-free issue was addressed with improved memory management.
CVE-2026-28879 -
Audio
An attacker may be able to cause unexpected app termination
A type confusion issue was addressed with improved memory handling.
CVE-2026-28822 -
ImageIO
Processing a maliciously crafted file may lead to unexpected app termination
This is a vulnerability in open source code and Apple Software is among the affected projects. The CVE-ID was assigned by a third party. Learn more about the issue and CVE-ID at cve.org .
CVE-2025-64505 -
UIFoundation
An app may be able to cause a denial-of-service
A stack overflow was addressed with improved input validation.
CVE-2026-28852 -
CoreMedia
Processing an audio stream in a maliciously crafted media file may terminate the process
An out-of-bounds access issue was addressed with improved bounds checking.
CVE-2026-20690 -
Crash Reporter
An app may be able to enumerate a user's installed apps
A privacy issue was addressed by removing sensitive data.
CVE-2026-28878 -
libxpc
An app may be able to enumerate a user's installed apps
This issue was addressed with improved checks.
CVE-2026-28882 -
Sandbox Profiles
An app may be able to fingerprint the user
A permissions issue was addressed with additional restrictions.
CVE-2026-28863 -
WebKit
Processing maliciously crafted web content may prevent Content Security Policy from being enforced
This issue was addressed through improved state management.
CVE-2026-20665
tvOS 26 Security Release History
tvOS 26.4 in context: the security releases Apple has published for tvOS 26, newest first, with the number of fixes each carried.
The Same Fixes Elsewhere
Apple ships most fixes to every platform that shares the code, and to older versions still under support. These releases close at least one of the same CVEs:
Frequently Asked Questions
What does tvOS 26.4 fix?
19 security vulnerabilities in 15 parts of the system, from Apple's advisory of March 24, 2026.
Was anything fixed in tvOS 26.4 exploited?
Apple does not say so for any of the 19 fixes.
Which devices can install tvOS 26.4?
Apple TV HD and Apple TV 4K (all models).
Is tvOS 26.4 the latest security update?
No. tvOS 26.6, from July 27, 2026, is newer and includes these fixes.
Source: About the security content of tvOS 26.4, Apple. Rechecked automatically while Apple is still adding entries.