What is the CVSS score of EUVD-2026-49453?

EUVD-2026-49453 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: 0.1%.

Is there a patch available for EUVD-2026-49453?

Yes, a patch is available for EUVD-2026-49453. Update the affected software to the latest version immediately.

Apple EUVD-2026-49453

| CVE-2026-64691 CRITICAL

Classic Buffer Overflow (CWE-120)

2026-07-27 apple

GHSA-jw76-wr94-p2rj

Buffer 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

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 - 16:48 vuln.today

Patch available

Jul 27, 2026 - 21:17 EUVD

CVE Published

Jul 27, 2026 - 20:14 cve.org

UNKNOWN (no severity yet)

CVE Published

Jul 27, 2026 - 20:14 cve.org

CRITICAL 9.8

DescriptionCVE.org

A buffer overflow was addressed with improved size validation. This issue is fixed in macOS Tahoe 26.6. An app may be able to cause unexpected system termination.

AnalysisAI

Buffer overflow in Apple macOS allows a malicious app to cause unexpected system termination. Affects macOS versions prior to 26.6 (Tahoe). No active exploitation or public exploit code is known, and EPSS indicates a low 0.15% probability of exploitation.