Vulnerability record · CVE-2026-43773 · published 27 July 2026

CVE-2026-43773: Apple macos out-of-bounds read vulnerability

Apple · Macos

An out-of-bounds read 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. Mounting a maliciously crafted disk image may cause unexpected system termination or corrupt kernel memory.

9.8 CVSS 3.1 Critical EPSS 0.59% · top 54.2% CWE-125 · Out-of-bounds read

9.8CVSS 3.1 base score

0.59%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

3References

28 Jul 2026Last modified by NVD

Description

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Macos Apple

References

Link	Tags
https://support.apple.com/en-us/128067	Release NotesVendor Advisory
https://support.apple.com/en-us/128071	Release NotesVendor Advisory
https://support.apple.com/en-us/128072	Release NotesVendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-43773), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.