What is the CVSS score of EUVD-2026-49421?

EUVD-2026-49421 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-2026-49421?

Yes, a patch is available for EUVD-2026-49421. Update the affected software to the latest version immediately.

Apple EUVD-2026-49421

| CVE-2026-43710 CRITICAL

Buffer Overflow (CWE-119)

2026-07-27 apple

GHSA-c5x3-xgpq-vrrv

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 - 15:34 vuln.today

Patch available

Jul 27, 2026 - 21:17 EUVD

CVE Published

Jul 27, 2026 - 20:14 cve.org

CRITICAL 9.8

CVE Published

Jul 27, 2026 - 20:14 cve.org

UNKNOWN (no severity yet)

DescriptionCVE.org

The 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 attacker may be able to cause unexpected system termination or corrupt kernel memory.

AnalysisAI

Kernel memory corruption in macOS allows remote code execution with high impact on confidentiality, integrity, and availability. A buffer overflow vulnerability allows network-based attackers to execute arbitrary code with kernel privileges, potentially compromising the system. Patches are available in macOS Sequoia 15.7.8, Sonoma 14.8.8, and Tahoe 26.6, and while no active exploitation has been reported, the remotely exploitable nature without authentication makes patching critical.