What is the CVSS score of CVE-2026-64699?

CVE-2026-64699 has a CVSS 3.1 base score of 5.5 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N. EPSS exploitation probability: 0.2%.

Is there a patch available for CVE-2026-64699?

Yes, a patch is available for CVE-2026-64699. Update the affected software to the latest version immediately.

Apple CVE-2026-64699

EUVD-2026-49516 MEDIUM

Use of Uninitialized Variable (CWE-457)

2026-07-27 apple

GHSA-554h-c6gx-2294

Information Disclosure Apple

5.5

CVSS 3.1 · Vendor: apple

Severity by source

Vendor (apple) PRIMARY

5.5 MEDIUM

AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Primary rating from Vendor (apple) · only source for this CVE.

CVSS VectorVendor: apple

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Lifecycle Timeline

Analysis Generated

Jul 28, 2026 - 15:31 vuln.today

CVSS changed

Jul 28, 2026 - 15:22 NVD

5.5 (MEDIUM)

Patch available

Jul 27, 2026 - 21:17 EUVD

CVE Published

Jul 27, 2026 - 20:13 cve.org

UNKNOWN (no severity yet)

CVE Published

Jul 27, 2026 - 20:13 cve.org

MEDIUM 5.5

DescriptionCVE.org

A memory initialization issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. An app may be able to disclose kernel memory.

AnalysisAI

Kernel memory disclosure in macOS allows a local app to read uninitialized kernel memory, potentially exposing sensitive information. Apple has released patches in macOS Sonoma 14.8.8, Sequoia 15.7.8, and Tahoe 26.6. The vulnerability has a low EPSS score (0.17%) with no known active exploitation or public exploit code.