What is the CVSS score of CVE-2026-64694?

CVE-2026-64694 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.2%.

Is there a patch available for CVE-2026-64694?

Yes, a patch is available for CVE-2026-64694. Update the affected software to the latest version immediately.

macOS CVE-2026-64694

EUVD-2026-49493 CRITICAL

Integer Overflow or Wraparound (CWE-190)

2026-07-27 apple

GHSA-xxvf-7jx2-3m69

Buffer Overflow Integer Overflow Apple

9.8

CVSS 3.1 · Vendor: apple

Severity by source

Vendor (apple) PRIMARY

9.8 CRITICAL

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

vuln.today AI

5.5 MEDIUM

Local attack requiring user to run a malicious app, no confidentiality or integrity impact, only availability loss.

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

4.0 AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (apple).

CVSS VectorVendor: apple

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Jul 28, 2026 - 16:27 vuln.today

CVSS changed

Jul 28, 2026 - 16:22 NVD

9.8 (CRITICAL)

Patch available

Jul 27, 2026 - 21:17 EUVD

CVE Published

Jul 27, 2026 - 20:12 cve.org

UNKNOWN (no severity yet)

CVE Published

Jul 27, 2026 - 20:12 cve.org

CRITICAL 9.8

DescriptionCVE.org

An integer overflow was addressed with improved input validation. 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 cause unexpected system termination.

AnalysisAI

Unexpected system termination in Apple macOS allows a local application to trigger an integer overflow, causing denial-of-service. Versions prior to Sequoia 15.7.8, Sonoma 14.8.8, and Tahoe 26.6 are affected. The vulnerability has a low exploitation likelihood (EPSS 0.16%) and no known active exploitation or public exploit code.

Technical ContextAI

An integer overflow (CWE-190) exists in macOS due to insufficient input validation. The flaw likely resides in a kernel or system component that processes values from locally executed applications. The CPE cpe:2.3:a:apple:macos:*:*:*:*:*:*:*:* confirms the affected product is the macOS operating system across all versions prior to the fixed releases.

RemediationAI

Apply the latest security updates from Apple: upgrade to macOS Sequoia 15.7.8, Sonoma 14.8.8, or Tahoe 26.6. No workarounds are recommended; mitigate by avoiding execution of untrusted applications until patching is complete.