What’s Vulnerable › Vulnerabilities

CVE-2021-30908

• Severity: low (CVSS 3.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-08-24 · updated 2026-06-17

Description

An authentication issue was addressed with improved state management. This issue is fixed in macOS Monterey 12.0.1, macOS Big Sur 11.6.1. A local attacker may be able to view the previous logged-in user’s desktop from the fast user switching screen.

Affected products

• Apple macOS: from 11.0 before 11.6.1; 12.0 — fixed in 11.6.1

How to fix

Upgrade to a fixed version: Apple macOS 11.6.1. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/HT212869
• https://support.apple.com/en-us/HT212872
• https://support.apple.com/en-us/HT212869
• https://support.apple.com/en-us/HT212872

Get alerted when CVE-2021-30908 or the next vulnerability affects your stack