What is the CVSS score of CVE-2026-43748?

CVE-2026-43748 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-2026-43748?

Yes, a patch is available for CVE-2026-43748. Update the affected software to the latest version immediately.

Apple CVE-2026-43748

EUVD-2026-49497 CRITICAL

Out-of-bounds Write (CWE-787)

2026-07-27 apple

GHSA-mph6-9jcc-qx8c

Buffer Overflow Memory Corruption 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

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

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 - 16:54 vuln.today

Patch available

Jul 27, 2026 - 21:17 EUVD

CVE Published

Jul 27, 2026 - 20:12 cve.org

CRITICAL 9.8

CVE Published

Jul 27, 2026 - 20:12 cve.org

UNKNOWN (no severity yet)

DescriptionCVE.org

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.7.8, macOS Tahoe 26.6. An app may be able to cause unexpected system termination.

AnalysisAI

Unexpected system termination in macOS prior to Sequoia 15.7.8 and Tahoe 26.6 allows a local application to crash the operating system via an out-of-bounds write. Although the vulnerability is assigned a critical CVSS 9.8 due to potential memory corruption risks, the Apple advisory only confirms denial-of-service impact. No active exploitation is reported, and EPSS (0.15%) indicates low exploitation probability.