What is the CVSS score of CVE-2026-20688?

CVE-2026-20688 has a CVSS 3.1 base score of 9.3 (Critical). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H. EPSS exploitation probability: 0.0%.

Which versions of iOS are affected by CVE-2026-20688?

CVE-2026-20688 is a critical sandbox escape vulnerability affecting Apple iOS, iPadOS, macOS, and visionOS that enables local attackers to break out of application sandboxes and gain unauthorized…. A patch is available.

iOS CVE-2026-20688

EUVD-2026-15059 CRITICAL

Path Traversal (CWE-22)

2026-03-25 apple

GHSA-8x27-8fvr-pw94

Path Traversal Apple iOS macOS

9.3

CVSS 3.1

CVSS VectorNVD

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Updated

Apr 16, 2026 - 05:49 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

26.4,15.7.5,14.8.5

EUVD ID Assigned

Mar 25, 2026 - 01:00 euvd

EUVD-2026-15059

Analysis Generated

Mar 25, 2026 - 01:00 vuln.today

CVE Published

Mar 25, 2026 - 00:31 nvd

CRITICAL 9.3

DescriptionNVD

A path handling issue was addressed with improved validation. This issue is fixed in iOS 26.4 and iPadOS 26.4, macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.4, visionOS 26.4. An app may be able to break out of its sandbox.

AnalysisAI

Sandbox escape vulnerability in Apple iOS, iPadOS, macOS, and visionOS allows local attackers to break out of application sandboxes through improper path validation, potentially enabling unauthorized access to system resources and data. An attacker with local access could leverage this flaw to execute arbitrary operations outside application boundaries and bypass security restrictions. …

RemediationAI

Within 24 hours: Inventory all Apple devices running iOS, iPadOS, macOS, and visionOS across the organization and identify affected versions. Within 7 days: Apply the vendor-released patch to all affected Apple devices as updates become available from Apple. …

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-2026-20688 vulnerability details – vuln.today

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iOS CVE-2026-20688

CVSS VectorNVD

Lifecycle Timeline

DescriptionNVD

AnalysisAI

RemediationAI

Full analysis requires sign-in

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External POC / Exploit Code