CVE-2026-65400

Screen Sharing: An attacker on the network may be able to authenticate to Screen Sharing without valid credentials

CVE-2026-65400 is fixed in 3 products on 1 platform, first by Sequoia 15.7.9, released August 6, 2026. It is being exploited: CISA added it to the Known Exploited Vulnerabilities catalog on August 18, 2026. Patch Radar priority: Patch now.

Patch nowCISA KEV

CVSS

9.8

CRITICAL

Exploitation

Exploited

Listed by CISA

CISA KEV

Aug 18, 2026

Federal due date Aug 21, 2026

EPSS

0.0172

77th percentile

An authentication issue was addressed with improved state management.

Where it's fixed

Product	Fixed in	Fix	Released
macOS
Sequoia	15.7.9	Sequoia 15.7.9	Aug 6, 2026
Sonoma	14.8.9	Sonoma 14.8.9	Aug 6, 2026
Tahoe	26.7	Tahoe 26.7	Sep 14, 2026
Tahoe	26.6.1	Tahoe 26.6.1	Aug 6, 2026

Details

Published
August 6, 2026
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA required action
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Vendor advisory
https://support.apple.com/en-us/148172

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