CVE-2026-64767

⛔ critical

Summary

A buffer overflow was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.6. A remote attacker may be able to cause unexpected system termination or corrupt kernel memory.

CVSS Score

9.8

Critical

EPSS Score

0.5

Exploit Probability

Published Date

2026-07-27

First Seen: 2026-07-31

📊 Relative Risk Intelligence

This CVE is Very High Risk - more severe than 90.5% of all 340,405 vulnerabilities in our database.

#32,269

Top 10% most severe

Severity Percentile

🎯 CISA SSVC Assessment Updated: Jul 28, 2026

🔍 Exploitation Status

None

No known exploits

⚙️ Automatable

YES

Can be exploited automatically

💥 Technical Impact

Total

Complete system compromise possible

SSVC data provided by CISA

Last Modified 2026-07-28

Source NVD 🔗

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

CWE IDs (Weakness Types)

CWE-120

📦 Affected Products 3

Vendor	Product	Status	Affected Versions
apple	macos	Affected	> 14.0 < 14.8.8
apple	macos	Affected	> 15.0 < 15.7.8
apple	macos	Affected	> 26.0 < 26.6

🔗 References 3

https://support.apple.com/en-us/128067

Release Notes Vendor Advisory

https://support.apple.com/en-us/128071

Release Notes Vendor Advisory

https://support.apple.com/en-us/128072

Release Notes Vendor Advisory

🔗 Related CVEs 6

CVE ID	Severity	CVSS	EPSS	Summary	Published
CVE-2026-20672	🔶 medium	5.5	0.1	An information disclosure issue was addressed with improved privacy controls. This issue is fixed in macOS Sequoia 15.7....	2026-07-27
CVE-2026-28849	🔶 medium	5.5	0.1	The issue was addressed with improved checks. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8. A malici...	2026-07-27
CVE-2026-28896	⚠️ high	7.7	0.1	The issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8....	2026-07-27
CVE-2026-28900	🔶 medium	5.5	0.1	A file quarantine bypass was addressed with additional checks. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma...	2026-07-27
CVE-2026-28911	⛔ critical	9.8	0.3	The issue was addressed with improved memory handling. This issue is fixed in macOS Sonoma 14.8.8, macOS Tahoe 26.6. A m...	2026-07-27
CVE-2026-28912	⚠️ high	7.8	0.1	A logic issue was addressed with improved restrictions. This issue is fixed in macOS Sequoia 15.7.8, macOS Tahoe 26.6. A...	2026-07-27

These CVEs affect the same products