What is the CVSS score of CVE-2026-20687?

CVE-2026-20687 has a CVSS 3.1 base score of 7.1 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H. EPSS exploitation probability: 0.0%.

Which versions of iOS are affected by CVE-2026-20687?

CVE-2026-20687 is a high-severity use-after-free vulnerability affecting Apple's operating systems (iOS, iPadOS, macOS, tvOS, watchOS) that allows locally installed applications to corrupt kernel…. A patch is available.

iOS CVE-2026-20687

EUVD-2026-15058 HIGH

Use After Free (CWE-416)

2026-03-25 apple

GHSA-c4px-j3mf-78gh

Denial Of Service Use After Free Memory Corruption Apple iOS macOS

7.1

CVSS 3.1

CVSS VectorNVD

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

Attack Vector

Local

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Updated

Apr 16, 2026 - 06:16 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

26.4,15.7.5,18.7.7

EUVD ID Assigned

Mar 25, 2026 - 01:00 euvd

EUVD-2026-15058

Analysis Generated

Mar 25, 2026 - 01:00 vuln.today

CVE Published

Mar 25, 2026 - 00:35 nvd

HIGH 7.1

DescriptionNVD

A use after free issue was addressed with improved memory management. This issue is fixed in iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Sequoia 15.7.5, macOS Tahoe 26.4, tvOS 26.4, watchOS 26.4. An app may be able to cause unexpected system termination or write kernel memory.

AnalysisAI

Apple's iOS, iPadOS, macOS, tvOS, and watchOS contain a use-after-free vulnerability that could allow a local attacker to corrupt kernel memory or cause unexpected system crashes. An installed application can trigger this memory corruption flaw through user interaction, potentially leading to denial of service or unauthorized kernel-level modifications. …

RemediationAI

Within 24 hours: Inventory all organizational Apple devices (iOS, iPadOS, macOS, tvOS, watchOS) and their current OS versions; alert users not to install untrusted applications. Within 7 days: Monitor Apple security advisories for vendor-released patches and prepare deployment procedures. …

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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Get intelligence summaries, risk assessment, exploit details, threat intel, and remediation guidance.

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CVE-2026-20687 vulnerability details – vuln.today

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