Vulnary
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Critical· 9.8official fix available

CVE-2026-64727

CVE-2026-64727 is a critical type confusion vulnerability in macOS and tvOS that could allow apps to cause unexpected system crashes. It is fixed in macOS Tahoe 26.6 and tvOS 26.6.

publishedJul 27, 2026
last modifiedJul 29, 2026
sourcesNVD
severity · cvss
9.8
critical · how bad it is
exploitation · epss
<1%
28th 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

Users of macOS Tahoe and tvOS prior to version 26.6

02

Real-world impact

An app could trigger system termination, potentially disrupting device functionality.

03

Why this severity

CVSS 9.8 (critical): High confidence in remote exploitation without user interaction, leading to full system compromise.

04

What to do about it

official fix available
recommended steps
  1. 01Upgrade macOS to Tahoe 26.6 or later.
  2. 02Upgrade tvOS 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 →