CVE-2026-65400
critical CISA KEVApple macOS Improper Authentication Vulnerability
Vendor / product: Apple — macOS
An authentication issue was addressed with improved state management. This issue is fixed in macOS Golden Gate 27, macOS Sequoia 15.7.9, macOS Sonoma 14.8.9, macOS Tahoe 26.6.1, macOS Tahoe 26.7. An attacker on the network may be able to authenticate to Screen Sharing without valid credentials.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Required action (CISA)
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.
Affected products
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
References
- https://support.apple.com/en-us/148170 product-security@apple.com
- https://support.apple.com/en-us/148171 product-security@apple.com
- https://support.apple.com/en-us/148172 product-security@apple.com
- https://support.apple.com/en-us/149035 product-security@apple.com
- https://support.apple.com/en-us/149042 product-security@apple.com
- http://seclists.org/fulldisclosure/2026/Aug/36 af854a3a-2127-422b-91ae-364da2661108
- http://seclists.org/fulldisclosure/2026/Aug/37 af854a3a-2127-422b-91ae-364da2661108
- https://advisories.ncsc.nl/2026/ncsc-2026-0280.html 134c704f-9b21-4f2e-91b3-4a467353bcc0
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-65400 134c704f-9b21-4f2e-91b3-4a467353bcc0