CVE-2026-20666

Name: CVE-2026-20666
Creator: NVD / NIST
Published: 2026-02-11T23:16:09.02+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.11%

Last modified Jun 17, 2026

CVE-2026-20666 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. An authorization issue was addressed with improved state management. This issue is fixed in macOS Tahoe 26.3. EPSS estimates a 0.11% chance of exploitation in the next 30 days.

Description

An authorization issue was addressed with improved state management. This issue is fixed in macOS Tahoe 26.3. An app may be able to access sensitive user data.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.11%

1.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-285

Affected Software

Vendor	Product	Versions
Apple	Macos	< 26.3

References

https://support.apple.com/en-us/126348Release Notes, Vendor Advisory

Timeline

Published: Feb 11, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-20666?

An authorization issue was addressed with improved state management. This issue is fixed in macOS Tahoe 26.3. An app may be able to access sensitive user data.

How severe is CVE-2026-20666?

CVE-2026-20666 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.11% probability of exploitation in the next 30 days.

How do I fix CVE-2026-20666?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-20666?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST