What it is
Apple macOS contains an improper authentication vulnerability that could allow an attacker on the network to authenticate to Screen Sharing without valid credentials.
What to do
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 notices and references
- support.apple.com/en-us/148170
- support.apple.com/en-us/148171
- support.apple.com/en-us/148172
- nvd.nist.gov/vuln/detail/CVE-2026-65400
Description and required action as published by CISA. Full record at NVD.
Other Apple entries on the list
- Multiple Products Apple Multiple Products Improper Authentication Vulnerability CVE-2024-27834 · Nov 4, 2026
- Multiple Products Apple Multiple Products Out-of-Bounds Write Vulnerability CVE-2026-86950 · Sep 29, 2026
- Multiple Products Apple Multiple Products Classic Buffer Overflow Vulnerability CVE-2025-43520 · Mar 20, 2026
- Multiple Products Apple Multiple Products Improper Locking Vulnerability CVE-2025-43510 · Mar 20, 2026
- Multiple Products Apple Multiple Products Buffer Overflow Vulnerability CVE-2025-31277 · Mar 20, 2026
- Multiple Products Apple Multiple products Use-After-Free Vulnerability CVE-2023-43000 · Mar 5, 2026