PatchTheCVECVE-2026-64727: A type confusion issue was addressed with improved memory handling
CVE-2026-64727 is a critical-severity flaw (CVSS 9.8) affecting macos, tvos. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- Critical severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 9.8 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.5% (top 58%) |
| CISA exploited list | No |
| Weakness | CWE-843 |
| Published | 2026-07-27 |
| Last modified | 2026-07-29 |
Last updated 2026-07-29 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-64727?
macos: upgrade to 26.6; tvos: upgrade to 26.6. Exact commands for each OS are on this page.
Is CVE-2026-64727 being exploited?
CVE-2026-64727 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-64727 affect?
CVE-2026-64727 affects macos, tvos. Severity is critical (CVSS 9.8). 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.
How urgent is CVE-2026-64727?
Priority 50/100. Critical severity; Remotely exploitable, no login, no user action
Software pages
macOS vulnerabilities · tvOS vulnerabilities
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