# CVE-2026-65400: Apple macOS Improper Authentication Vulnerability

> CVE-2026-65400: Apple macOS Improper Authentication Vulnerability. CVSS 9.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2026-65400
Last updated: 2026-10-24T16:10:00Z

- Published: 2026-08-06 18:17 UTC · Updated: 2026-10-24 16:10 UTC · Assigner: apple
- CVSS: 9.8 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS: 1.7%, 77th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2026-08-18, federal due date 2026-08-21, ransomware use: Unknown

## Description

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.

## 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.

## Affected vendors and products

- Apple: macOS

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-65400)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-65400)
- [https://support.apple.com/en-us/148170](https://support.apple.com/en-us/148170)
- [https://support.apple.com/en-us/148171](https://support.apple.com/en-us/148171)
- [https://support.apple.com/en-us/148172](https://support.apple.com/en-us/148172)
- [https://support.apple.com/en-us/149035](https://support.apple.com/en-us/149035)
- [https://support.apple.com/en-us/149042](https://support.apple.com/en-us/149042)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-65400 · Markdown: https://rewindex.com/cve/CVE-2026-65400.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-65400 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:14:42.531Z