What is the CVSS score of CVE-2026-28821?

CVE-2026-28821 has a CVSS 3.1 base score of 8.4 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

Which versions of macOS are affected by CVE-2026-28821?

CVE-2026-28821 is a high-severity privilege escalation vulnerability in macOS that allows applications to bypass system privilege checks and gain elevated access.. A patch is available.

macOS CVE-2026-28821

EUVD-2026-15085 HIGH

Improper Access Control (CWE-284)

2026-03-25 apple

GHSA-7jx6-r36g-7pwq

Authentication Bypass Apple macOS

8.4

CVSS 3.1

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Updated

Apr 16, 2026 - 06:17 EUVD-patch-fix

executive_summary

Re-analysis Queued

Apr 16, 2026 - 05:29 backfill_euvd_patch

patch_released

Patch available

Apr 16, 2026 - 05:29 EUVD

14.8.5,26.4,15.7.5

EUVD ID Assigned

Mar 25, 2026 - 01:00 euvd

EUVD-2026-15085

Analysis Generated

Mar 25, 2026 - 01:00 vuln.today

CVE Published

Mar 25, 2026 - 00:32 nvd

HIGH 8.4

DescriptionNVD

A validation issue existed in the entitlement verification. This issue was addressed with improved validation of the process entitlement. This issue is fixed in macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.4. An app may be able to gain elevated privileges.

AnalysisAI

A validation flaw in macOS entitlement verification allows applications to bypass privilege checks and gain elevated system privileges. The vulnerability affects macOS Sequoia 15.7.4 and earlier, macOS Sonoma 14.8.4 and earlier, and macOS Tahoe 26.3 and earlier. …

RemediationAI

Within 24 hours: Identify all macOS systems running Sequoia 15.7.4 or earlier, Sonoma 14.8.4 or earlier, or Tahoe 26.3 or earlier. Within 7 days: Deploy patches to macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, and macOS Tahoe 26.4 across all affected systems using your MDM or patch management platform. …

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

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CVE-2026-28821 vulnerability details – vuln.today

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macOS CVE-2026-28821

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

AnalysisAI

RemediationAI

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External POC / Exploit Code