CVE-2026-65400An authentication issue was addressed with improved state management.
Updated under an hour ago ()
Does this affect you?
It affects Apple macOS. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Aug 18, 2026; federal agencies had to remediate by Aug 21, 2026. Treat that date as your deadline.
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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
- 9.8 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-287
- Known exploited
- Added to CISA KEV Aug 18, 2026; federal remediation due Aug 21, 2026Apply 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.
- EPSS (exploitation in the next 30 days)
- 1.72% (percentile 77)
- Assigned by
- apple
- NVD analysis
- Analyzed
- Record last updated
- Sep 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Apple macOS apple:macos (from the name) | before 14.8.9; before 15.7.9; before 26.6.1; before 26.7; before 27 | CNA record |
apple macos apple:macos | from 14.0 before 14.8.9; from 15.0 before 15.7.9; from 26.0 before 26.6.1 | NVD |
References
- https://support.apple.com/en-us/148170release-notes, vendor-advisory
- https://support.apple.com/en-us/148171release-notes, vendor-advisory
- https://support.apple.com/en-us/148172release-notes, vendor-advisory
- https://support.apple.com/en-us/149035release-notes, vendor-advisory
- https://support.apple.com/en-us/149042release-notes, vendor-advisory
- http://seclists.org/fulldisclosure/2026/Aug/36mailing-list
- http://seclists.org/fulldisclosure/2026/Aug/37broken-link
- https://advisories.ncsc.nl/2026/ncsc-2026-0280.htmlthird-party-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-65400us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.