CVE-2021-30817

MEDIUM

5.5

CVSS Score

Published: October 28, 2021 at 06:17 PM UTC

Updated: June 17, 2026 at 03:50 AM UTC

1 product affected across 1 vendormacOS

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.6%

Description

A permissions issue was addressed with improved validation. This issue is fixed in macOS Big Sur 11.5. A malicious application may be able to access data about the accounts the user is using Family Sharing with.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

macOS · Apple

95%

v < 11.5

Affected range stops below 11.5, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://support.apple.com/en-us/HT212602

References (1)

x_refsource_MISCVendor Advisory

Source: [email protected]

https://support.apple.com/en-us/HT212602

CVSS

5.5MEDIUM[email protected]

Attack Vector: LOCAL
Complexity: LOW
Privileges: NONE
User Interaction: REQUIRED
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: NONE
Availability: NONE

Vector?

Quick Info

StatusMODIFIED

CWE

NVD-CWE-noinfo

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