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CVE-2026-65400CISA KEV

Apple macOS Improper Authentication Vulnerability

CISA lists this Apple macOS vulnerability as known exploited. The vendor's advisory has the fixed versions.

CISA catalog record

Apple macOS contains an improper authentication vulnerability that could allow an attacker on the network to authenticate to Screen Sharing without valid credentials.

Product: macOS
Added to KEV: 18 Aug 2026
Federal remediation due: 21 Aug 2026
Known ransomware use: Not reported

Page history

Changes are dated when recorded; day views use the last saved version from that UTC day, and citations stay fixed.

Cite this version

Field-level log (2)

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23 Oct 2026 · 09:33:49 UTC Source coverage: cisa-kevIncomplete → Current
23 Oct 2026 · 08:31:50 UTC Source coverage: cisa-kevCurrent → Incomplete

Explore global source statements, affected packages and advisory history for CVE-2026-65400. The catalog has a separate collection scope from Microsoft release records.

cve-program · CVE-2026-65400

Published

macOS

Vendor product

Original vendor version evidence · not evaluated as a NuGet range

{
                    "vendor": "Apple",
                    "product": "macOS",
                    "versions": [
                        {
                            "version": "0",
                            "status": "affected",
                            "lessThan": "14.8.9",
                            "versionType": "custom"
                        },
                        {
                            "version": "0",
                            "status": "affected",
                            "lessThan": "15.7.9",
                            "versionType": "custom"
                        },
                        {
                            "version": "0",
                            "status": "affected",
                            "lessThan": "26.6.1",
                            "versionType": "custom"
                        },
                        {
                            "version": "0",
                            "status": "affected",
                            "lessThan": "26.7",
                            "versionType": "custom"
                        },
                        {
                            "version": "0",
                            "status": "affected",
                            "lessThan": "27",
                            "versionType": "custom"
                        }
                    ]
                }