What is CVE-2025-43237?

CVE-2025-43237 is a critical-severity vulnerability in Apple macOS, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2025-07-30.

How severe is CVE-2025-43237?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2025-43237 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Apple macOS

CVE-2025-43237

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in macOS Sequoia 15.6. An app may be able to cause unexpected system termination.

Vulnerability class: Buffer Overflow

EPSS: 0.005 (40.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/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

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

product-security@apple.com (Release Notes, Vendor Advisory)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2025-43237?: CVE-2025-43237 is a critical-severity vulnerability in Apple macOS, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2025-07-30.
How severe is CVE-2025-43237?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2025-43237 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.