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macOS EUVDEUVD-2026-15041

| CVE-2026-20633 MEDIUM
Improper Link Resolution Before File Access (CWE-59)
2026-03-25 apple GHSA-9cv6-73mr-84fw
5.5
CVSS 3.1 · NVD
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Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V5 - File Handling Symlink resolution safety
Impact

Without published CVSS vectors, EPSS scores, or confirmation of KEV (Known Exploited Vulnerability) status, the real-world risk must be assessed through available signals. The vulnerability is classified as Information Disclosure with an attack vector that requires an application to be present on the system (local attack vector implied). The fact that Apple released patches across three major macOS versions (Sequoia, Sonoma, and Tahoe) suggests this was considered significant enough for coordinated remediation. The lack of disclosed CVSS metrics and exploitation details suggests this may represent a moderate-complexity exploitation scenario rather than trivial worm-level risk. However, any symlink-based information disclosure in macOS is serious given the quantity of sensitive user data stored on typical systems. Priority should be elevated if KEV confirmation emerges or if proof-of-concept details surface, but currently this represents a standard patching priority vulnerability affecting macOS users.

Exploit ScenarioDerived

A malicious application installed on a macOS system could exploit improper symlink handling by creating symbolic links to sensitive user directories (such as ~/Library/Passwords, ~/Documents, or other private data locations). When the vulnerable macOS kernel or system processes follow these symlinks without proper validation, the application gains unauthorized read access to the sensitive data, allowing exfiltration of passwords, documents, browser data, or other confidential information. This scenario requires the attacker to first compromise the system with an application (via social engineering, software supply chain, or other vectors), but once installed, the symlink vulnerability provides a privilege escalation path to access data the application should not reach.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
Patch available 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 25, 2026

This vulnerability involves improper handling of symbolic links (symlinks) in macOS, which could allow an application to access sensitive user data without proper authorization. The issue affects multiple macOS versions including Sequoia 15.7.5, Sonoma 14.8.5, and Tahoe 26.4, representing an information disclosure vulnerability with potential impact on user privacy. Apple has released patches to address the symlink handling deficiency, though specific attack complexity and exploitation metrics are not publicly detailed.

RemediationAI

Apply Apple's security updates immediately: upgrade macOS Sequoia to version 15.7.5 or later, macOS Sonoma to version 14.8.5 or later, or macOS Tahoe to version 26.4 or later. These patches directly address the symlink handling deficiency. Users can enable automatic security updates through System Preferences > General > Software Update to ensure future patches are applied promptly. As an interim control prior to patching, users should limit application installation to trusted sources only and review application permissions through System Preferences > Security & Privacy > App Management. Enterprise administrators should validate patch deployment across their macOS fleet and use Mobile Device Management (MDM) solutions to enforce minimum OS versions.

Affected VersionsENISA

macOS 0 <15.7.5
macOS 0 <26.4
macOS 0 <14.8.5

Affected Packages

euvd macos fix: 14.8.5, 15.7.5, 26.4

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

The vulnerability exists in the macOS operating system's symlink handling mechanism, which is a core file system feature used across all CPE variants matching cpe:2.3:a:apple:macos:*:*:*:*:*:*:*:*. Symlinks (symbolic links) are references to other files or directories that the operating system must resolve transparently. The root cause relates to insufficient validation or isolation when applications access symlinked resources, potentially allowing them to traverse to sensitive file system locations containing user data. This falls under the CWE category of improper access control and path traversal vulnerabilities. The issue fundamentally concerns how macOS validates and restricts application access to symlink targets, particularly when those targets contain sensitive user information.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 5.5 MEDIUM
AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

Lifecycle Timeline

2
Patch available
Apr 16, 2026 - 05:29 EUVD
15.7.5,26.4,14.8.5
CVE Published
Mar 25, 2026 - 00:35 nvd
MEDIUM 5.5

DescriptionCVE.org

This issue was addressed with improved handling of symlinks. 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 access user-sensitive data.

Executive ViewAI

Why It Matters

Organizations using This should be aware of moderate risk from CVE-2026-20633 rated CVSS 5.5. Exploitation could compromise the security of affected deployments. Organizations should apply vendor updates when available and monitor for exploitation.

Business Impact: Low
Compensating Controls

Apply vendor patch. If patching is delayed: restrict network access and enable monitoring.

Threat Intelligence Overview

EPSS Score
0.0%
Top 96% exploitable
Data Quality
6 sources
Confidence: High

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.0%
Patch available Yes
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision
Defer
Exploitation
None
System Exposure· derived
Small
Automatable
No
Human Impact
Low
Technical Impact
Partial

Priority Score

28
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +28
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

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