macOS
CVE-2021-1755
LOW
Severity by source
AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Lifecycle Timeline
1DescriptionNVD
A lock screen issue allowed access to contacts on a locked device. This issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.0.1. A person with physical access to an iOS device may be able to access contacts from the lock screen.
AnalysisAI
A lock screen issue allowed access to contacts on a locked device. Rated low severity (CVSS 2.4), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
Technical ContextAI
This vulnerability is classified as Missing Authorization (CWE-862), which allows attackers to access resources or perform actions without proper authorization checks. A lock screen issue allowed access to contacts on a locked device. This issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.0.1. A person with physical access to an iOS device may be able to access contacts from the lock screen. Affected products include: Apple Macos.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Implement role-based access control, validate authorization on every request server-side, apply principle of least privilege.
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Same weakness CWE-862 – Missing Authorization
View allSame technique Authentication Bypass
View allShare
External POC / Exploit Code
Leaving vuln.today