What is CVE-2025-43402?

CVE-2025-43402 is a high-severity vulnerability in Apple Macos, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2025-12-12.

How severe is CVE-2025-43402?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Apple Macos

CVE-2025-43402

The issue was addressed with improved memory handling. This issue is fixed in macOS Sequoia 15.7.4, macOS Sonoma 14.8.4, macOS Tahoe 26.1. An app may be able to cause unexpected system termination or corrupt process memory.

Vulnerability class: Buffer Overflow

EPSS: 0.002 (8.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Apple Macos — versions 0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

product-security@apple.com (Release Notes, Vendor Advisory)
product-security@apple.com
product-security@apple.com

Frequently asked questions

What is CVE-2025-43402?: CVE-2025-43402 is a high-severity vulnerability in Apple Macos, classified under Out-of-bounds Write. CVSS score: 7.8/10. Published 2025-12-12.
How severe is CVE-2025-43402?: High severity. CVSS v3 base score is 7.8 out of 10.