CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Lifecycle Timeline
3Description
A downgrade issue affecting Intel-based Mac computers was addressed with additional code-signing restrictions. This issue is fixed in macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.3, macOS Tahoe 26.4. An app may be able to access user-sensitive data.
Analysis
A downgrade vulnerability affecting Intel-based Mac computers allows malicious applications to bypass code-signing restrictions and access user-sensitive data. The vulnerability impacts macOS Sequoia (versions before 15.7.5), macOS Sonoma (versions before 14.8.5), macOS Tahoe (versions before 26.3 and 26.4), and affects all Intel-based Mac systems running vulnerable versions. …
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Remediation
Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.
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External POC / Exploit Code
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EUVD-2026-15074
GHSA-943h-6fx4-c427