Wiz
Vulnerability DatabaseCVE-2020-3910

CVE-2020-3910: 
macOS vulnerability analysis and mitigation

Overview

A buffer overflow vulnerability (CVE-2020-3910) was discovered in libxml2, affecting multiple Apple products. The vulnerability was disclosed and patched in March 2020, impacting iOS 13.4 and iPadOS 13.4, macOS Catalina 10.15.4, tvOS 13.4, watchOS 6.2, iTunes for Windows 12.10.5, iCloud for Windows 10.9.3, and iCloud for Windows 7.18 (Apple Security, Apple iOS).

Technical details

The vulnerability was identified as a buffer overflow issue in libxml2 that required improved size validation to remediate. The severity was rated as CRITICAL with a CVSS v3.1 base score of 9.8 (Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) (NVD).

Impact

The vulnerability could allow a remote attacker to execute arbitrary code on affected systems, potentially leading to complete system compromise. The high CVSS score indicates critical severity with potential for full confidentiality, integrity, and availability impacts (NVD).

Mitigation and workarounds

Apple addressed the vulnerability by implementing improved size validation in libxml2. Patches were released on March 24, 2020, through various system updates: iOS 13.4 and iPadOS 13.4, macOS Catalina 10.15.4, tvOS 13.4, watchOS 6.2, iTunes for Windows 12.10.5, iCloud for Windows 10.9.3, and iCloud for Windows 7.18 (Apple Security, Apple iOS).

Additional resources

Source: This report was generated using AI

Related macOS vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

CVE-2025-43359CRITICAL9.8
  • macOSmacOS
  • Kernel
NoYesSep 15, 2025
CVE-2025-43358HIGH8.8
  • macOSmacOS
  • Shortcuts
NoYesSep 15, 2025
CVE-2025-43400MEDIUM6.3
  • macOSmacOS
  • FontParser
NoYesSep 29, 2025
CVE-2025-43355MEDIUM5.5
  • macOSmacOS
  • MobileStorageMounter
NoYesSep 15, 2025
CVE-2025-43353MEDIUM5.5
  • macOSmacOS
  • Libinfo
NoYesSep 15, 2025

Free Vulnerability Assessment

Benchmark your Cloud Security Posture

Evaluate your cloud security practices across 9 security domains to benchmark your risk level and identify gaps in your defenses.

Request assessment

Additional Wiz resources

Cloud Vulnerability DB

Cloud Vulnerability DB

A community-led vulnerabilities database

Cloud Threat Landscape

Cloud Threat Landscape

A threat intelligence database

PEACH

PEACH

A tenant isolation framework

Get a personalized demo

Ready to see Wiz in action?

"Best User Experience I have ever seen, provides full visibility to cloud workloads."
David EstlickCISO
"Wiz provides a single pane of glass to see what is going on in our cloud environments."
Adam FletcherChief Security Officer
"We know that if Wiz identifies something as critical, it actually is."
Greg PoniatowskiHead of Threat and Vulnerability Management
Get a demo