What is CVE-2026-43665?

CVE-2026-43665 is a medium-severity vulnerability in Apple Macos, classified under Missing Authorization. CVSS score: 5.5/10. Published 2026-07-27.

How severe is CVE-2026-43665?

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

Auth bypass in Apple Macos

CVE-2026-43665

This issue was addressed with additional entitlement checks. This issue is fixed in macOS Sequoia 15.7.8, macOS Sonoma 14.8.8. A local attacker may be able to determine the legacy VNC password configured for Screen Sharing.

Vulnerability class: Broken Access Control

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:H/I:N/A:N.

Affected products

Apple Macos — versions 0

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

product-security@apple.com
product-security@apple.com

Frequently asked questions

What is CVE-2026-43665?: CVE-2026-43665 is a medium-severity vulnerability in Apple Macos, classified under Missing Authorization. CVSS score: 5.5/10. Published 2026-07-27.
How severe is CVE-2026-43665?: Medium severity. CVSS v3 base score is 5.5 out of 10.