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CVE-2026-64727

Apple macOS type confusion

9.8 CRITICALEPSS 0.50%
  1. Published27 Jul 2026

Description

A type confusion issue was addressed with improved memory handling. This issue is fixed in macOS Tahoe 26.6, tvOS 26.6. An app may be able to cause unexpected system termination.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Apple macOS≥ 26.0 < 26.6
Apple Tvos< 26.6

Remediation

Fixed in
Apple macOS≥ 26.6
Apple Tvos≥ 26.6

References

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Frequently asked

Is CVE-2026-64727 being actively exploited?

CVE-2026-64727 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.50%.

How severe is CVE-2026-64727?

CVE-2026-64727 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.50% probability of exploitation.

Which products are affected by CVE-2026-64727?

Affected products include Apple macOS, Apple Tvos.

How do I fix CVE-2026-64727?

Upgrade affected software to a fixed version, for example Apple macOS 26.6, Apple Tvos 26.6 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-64727 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.