What is CVE-2025-43380?

CVE-2025-43380 is a medium-severity vulnerability in Apple macOS, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2025-11-04.

How severe is CVE-2025-43380?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Buffer overflow in Apple macOS

CVE-2025-43380

An out-of-bounds write issue was addressed with improved input validation. This issue is fixed in macOS Sequoia 15.7.2, macOS Sonoma 14.8.2, macOS Tahoe 26.1. Parsing a file may lead to an unexpected app termination.

Vulnerability class: Buffer Overflow

EPSS: 0.002 (8.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Affected products

Apple Macos — versions 0

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

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

Frequently asked questions

What is CVE-2025-43380?: CVE-2025-43380 is a medium-severity vulnerability in Apple macOS, classified under Out-of-bounds Write. CVSS score: 5.5/10. Published 2025-11-04.
How severe is CVE-2025-43380?: Medium severity. CVSS v3 base score is 5.5 out of 10.