CVE-2026-64727

CRITICAL
Published Jul 27, 2026 Modified Jul 29, 2026 CWE-843

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.

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CVSS v3.1 Score

9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0049
Probability of exploitation
0.40%
Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-843 CWE-843

Affected Products

Vendor Product
apple macos
apple tvos

References

Frequently Asked Questions

What is CVE-2026-64727? +
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. It has a CVSS v3.1 base score of 9.8 (CRITICAL).
How severe is CVE-2026-64727? +
CVE-2026-64727 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0049, placing it in the 0th percentile for exploitation probability.
What products are affected by CVE-2026-64727? +
CVE-2026-64727 affects products from apple, specifically: macos, tvos. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2026-64727? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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