CVE-2026-20639

| EUVD-2026-15043 HIGH
2026-03-25 apple GHSA-7gg2-3r7f-v522
7.5
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

3
EUVD ID Assigned
Mar 25, 2026 - 01:00 euvd
EUVD-2026-15043
Analysis Generated
Mar 25, 2026 - 01:00 vuln.today
CVE Published
Mar 25, 2026 - 00:32 nvd
HIGH 7.5

Tags

Apple Integer Overflow Buffer Overflow macOS

Description

An integer overflow was addressed with improved input validation. This issue is fixed in macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.3. Processing a maliciously crafted string may lead to heap corruption.

Analysis

Integer overflow vulnerability in Apple macOS (Sequoia 15.7.4 and earlier, Sonoma 14.8.4 and earlier, Tahoe 26.2 and earlier) allows remote attackers to trigger heap corruption by processing a specially crafted string without requiring user interaction or privileges. The vulnerability results in denial of service and potential memory corruption but currently lacks a public patch. …

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Remediation

Within 7 days: Identify all affected systems and apply vendor patches promptly. Monitor vendor channels for patch availability.

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Priority Score

38
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +38
POC: 0

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CVE-2026-20639 vulnerability details – vuln.today
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