Vulnary
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Critical· 9.8official fix available

CVE-2026-64769

A critical flaw in Apple operating systems lets remote attackers write outside array bounds, causing apps to crash or memory to become corrupted. The issue can lead to unexpected termination or heap corruption. It has been fixed in recent OS releases.

publishedJul 27, 2026
last modifiedJul 28, 2026
sourcesNVD
severity · cvss
9.8
critical · how bad it is
exploitation · epss
<1%
35th percentile · chance of exploitation in 30 days
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →
auto-deletes from the system
counting…on Aug 27, 2026

An official fix is available, so this entry is kept for 30 days and then removed automatically.

01

Who is affected

Apple iOS, iPadOS, macOS (Sequoia, Sonoma, Tahoe), tvOS, and visionOS devices running versions before iOS 26.6, iPadOS 26.6, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6, tvOS 26.6, or visionOS 26.6.

02

Real-world impact

An attacker could crash applications or corrupt memory, potentially causing denial of service or enabling further exploitation on the affected device.

03

Why this severity

The CVSS score of 9.8 reflects the vulnerability’s ability to be exploited remotely without authentication or user interaction, and its complete loss of confidentiality, integrity, and availability.

04

What to do about it

official fix available
recommended steps
  1. 01Upgrade your iOS device to version 26.6 or later.
  2. 02Upgrade your iPadOS device to version 26.6 or later.
  3. 03Upgrade your macOS Sequoia device to version 15.7.8 or later.
  4. 04Upgrade your macOS Sonoma device to version 14.8.8 or later.
  5. 05Upgrade your macOS Tahoe device to version 26.6 or later.
  6. 06Upgrade your tvOS device to version 26.6 or later.
  7. 07Upgrade your visionOS device to version 26.6 or later.

NVD-referenced vendor advisory

05

Timeline

  1. Jul 27, 2026 · 3d ago
    Published
    Disclosed and added to the National Vulnerability Database.
  2. Jul 28, 2026 · 2d ago
    Official fix available
    A vendor patch or mitigation now exists — see the remediation steps above.
06

How it’s attacked

Attack vectorNetwork (remote)
Attack complexityLow
Privileges requiredNone
User interactionNone needed
ScopeUnchanged
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
07

References & advisories

NVD advisory ↗Search advisories ↗
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →