Is CVE-2026-64727 being actively exploited?

CVE-2026-64727 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2026-64727?

CVE-2026-64727 has a CVSS 3.1 base score of 9.8 (CRITICAL).

CVE-2026-64727

CRITICAL · CVSS 9.8EPSS 0.5%EU EUVD

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.

Key facts

CVSS score: 9.8 (v3.1)
Severity: CRITICAL
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-843
EPSS score: 0.5% (41th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2026-49559)
Published: July 27, 2026
NVD last modified: July 29, 2026
Status: Analyzed

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2026-49559 in the EU Vulnerability Database. Last updated in EUVD on July 28, 2026.

View on the EU Vulnerability Database

Affected products

apple / macos
apple / tvos

Certified products that may be affected

2 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Apple macOS 26 Tahoe: FileVault - Apple Inc. - Common Criteria CCEVS-VR-VID-11696-2026 - active
Apple macOS 26 Tahoe - Apple Inc. - Common Criteria CCEVS-VR-VID-11695-2026 - active

References

https://support.apple.com/en-us/128067(Release Notes, Vendor Advisory)
https://support.apple.com/en-us/128069(Release Notes, Vendor Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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