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TI-2021-11275 Aliases CVE-2021-30908

Apple macOS: A local attacker may be able to view the previous logged-in user’s desktop…

Priority LOW 16Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

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.

Why it matters now

EPSS 0.00278 20th percentileScored 2026-11-07
Fix Fixed macOS (Apple): 12.0, 11.6

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
ApplemacOSbefore 12.012.0Patch availableCNA
ApplemacOSbefore 11.611.6Patch availableCNA
  • macOS VendorApple Affected before 12.0 Fixed in 12.0 Patch available CNA
  • macOS VendorApple Affected before 11.6 Fixed in 11.6 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*11.0 to before 11.6.1VulnerableApple
cpe:2.3:o:apple:macos:12.0:*:*:*:*:*:*:*12.0VulnerableApple
  • cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:* Versions 11.0 to before 11.6.1 Vulnerable ·Apple
  • cpe:2.3:o:apple:macos:12.0:*:*:*:*:*:*:* Versions 12.0 Vulnerable ·Apple

Remediation

  • Fix · CNA macOS (Apple) Fixed in 12.0
  • Fix · CNA macOS (Apple) Fixed in 11.6

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Apple macOS 11.6

    72 records Highest priority Priority CRITICAL 4 CRITICAL, 5 MEDIUM, 63 LOW

    Other records, highest priority first

    • TI-2021-11230 Use after free in Apple macOSPriority CRITICAL 97
    • TI-2021-11253 Out-of-bounds write in Apple iOS and iPadOSPriority CRITICAL 93
    • TI-2021-11232 Integer overflow in Apple macOSPriority CRITICAL 93
    Show all 72 records →
  • Release ·

    Apple macOS 12.0

    45 records Highest priority Priority CRITICAL 1 CRITICAL, 3 MEDIUM, 41 LOW

    Other records, highest priority first

    • TI-2021-11253 Out-of-bounds write in Apple iOS and iPadOSPriority CRITICAL 93
    • TI-2021-11258 Buffer overflow in Apple iOS and iPadOSPriority MEDIUM 42
    • TI-2021-11371 Type confusion in Apple iOS and iPadOSPriority MEDIUM 41
    Show all 45 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-30908

References

Other 2

  • TI-2026-46583 Improper authentication in Apple macOS KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-28008 Out-of-bounds write in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 10.0
  • TI-2025-22441 Apple iOS and iPadOS: An attacker with arbitrary read and write capability may be able to… KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-22440 Memory corruption in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-17951 Out-of-bounds write in Apple Safari KEVCVSS 3.1CRITICAL 10.0
  • TI-2025-17847 Use after free in Apple iOS and iPadOS KEVCVSS 3.1CRITICAL 10.0
See all 3490 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences