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HIGH CISA KEV

CVE-2026-65400

CVSS v3

7.1

HIGH

EPSS Score

0.3 %

exploit probability

CISA KEV

Yes

known exploited

Exploitation

—

SSVC status

Description

An authentication issue was addressed with improved state management. This issue is fixed in macOS Sequoia 15.7.9, macOS Sonoma 14.8.9, macOS Tahoe 26.6.1. An attacker on the network may be able to authenticate to Screen Sharing without valid credentials.

CISA Known Exploited Vulnerability

Date Added
2026-08-18
Patch Due Date
2026-08-21
Ransomware Use
Unknown

Technical details

CVSS v3 Vector
3.1
Published
2026-08-06
Last Modified
2026-08-07

Frequently asked questions

What is CVE-2026-65400?

An authentication issue was addressed with improved state management. This issue is fixed in macOS Sequoia 15.7.9, macOS Sonoma 14.8.9, macOS Tahoe 26.6.1. An attacker on the network may be able to authenticate to Screen Sharing without valid credentials.

Is CVE-2026-65400 actively exploited?

Yes. CVE-2026-65400 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2026-08-21.

What is the CVSS score for CVE-2026-65400?

CVE-2026-65400 has a CVSS v3 base score of 7.1 (HIGH severity), with vector string 3.1.

Is CVE-2026-65400 affecting your environment?

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