Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-65400

CVE-2026-65400CRITICAL

Apple macOS — An authentication issue was addressed with improved state management.

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  H  H  H    9.8   .0172   76.7   YES

AFFECTED
  Product  Versions     Fixed
  macOS    unspecified  —

TIMELINE
  Jul 22  Reserved by apple
  Aug 6   Published (CNA: apple)
  Aug 18  ADDED TO KEV — CVE-2026-65400 (Apple macOS). Remediation due August 21, 2026.
  Aug 22  DUE DATE PASSED — CVE-2026-65400 (Apple macOS). CISA remediation deadline was August 21, 2026; still in catalog.

CWE-287 · CNA: apple · CVSS v3.1 · 9 references · NVD status: Analyzed · KEV due August 21, 2026

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.

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
July 22, 2026	Reserved	Reserved by apple
August 6, 2026	Published	Published (CNA: apple)
August 18, 2026	KEV ADDED	ADDED TO KEV — CVE-2026-65400 (Apple macOS). Remediation due August 21, 2026.
August 22, 2026	DUE DATE PASSED	DUE DATE PASSED — CVE-2026-65400 (Apple macOS). CISA remediation deadline was August 21, 2026; still in catalog.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Apple	macOS	—	—	—

Weaknesses

CWE-287

References (9)

http://seclists.org/fulldisclosure/2026/Aug/36 [Mailing List]
http://seclists.org/fulldisclosure/2026/Aug/37 [Broken Link]
https://advisories.ncsc.nl/2026/ncsc-2026-0280.html [Third Party Advisory]
https://support.apple.com/en-us/148170 [Release Notes, Vendor Advisory]
https://support.apple.com/en-us/148171 [Release Notes, Vendor Advisory]
https://support.apple.com/en-us/148172 [Release Notes, Vendor Advisory]
https://support.apple.com/en-us/149035 [Release Notes, Vendor Advisory]
https://support.apple.com/en-us/149042 [Release Notes, Vendor Advisory]
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-65400 [US Government Resource]

Authoritative record: CVE-2026-65400 at cve.org

Vendors: apple

Weaknesses: CWE-287

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-65400 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.