What is the CVSS score of CVE-2026-20631?

CVE-2026-20631 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

Which versions of macOS are affected by CVE-2026-20631?

CVE-2026-20631 is a privilege escalation vulnerability in macOS Tahoe that allows standard user accounts to gain elevated system access through a logic flaw in authorization checks.. A patch is available.

macOS CVE-2026-20631

EUVD-2026-15039 HIGH

2026-03-25 apple

GHSA-8cv4-qwjg-mxw5

Information Disclosure Apple macOS

8.8

CVSS 3.1

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

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

26.4

EUVD ID Assigned

Mar 25, 2026 - 01:00 euvd

EUVD-2026-15039

Analysis Generated

Mar 25, 2026 - 01:00 vuln.today

CVE Published

Mar 25, 2026 - 00:31 nvd

HIGH 8.8

DescriptionNVD

A logic issue was addressed with improved checks. This issue is fixed in macOS Tahoe 26.4. A user may be able to elevate privileges.

AnalysisAI

A logic flaw in macOS Tahoe allows local users to elevate their privileges through improved checks that were insufficient in earlier versions. This vulnerability affects macOS versions prior to 26.4 and enables privilege escalation attacks from standard user accounts to higher privilege levels. …

RemediationAI

Within 24 hours: Inventory all macOS Tahoe devices and identify systems running versions prior to 26.4. Within 7 days: Apply macOS Tahoe 26.4 or later to all affected systems, prioritizing devices with elevated user access or sensitive data. …

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-2026-20631 vulnerability details – vuln.today

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macOS CVE-2026-20631

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

AnalysisAI

RemediationAI

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External POC / Exploit Code