What’s Vulnerable › Vulnerabilities

CVE-2025-43520: Apple Multiple Products Classic Buffer Overflow Vulnerability

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2026-03-20
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-12 · updated 2026-10-07
• Weakness: CWE-120

Description

A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 18.7.2 and iPadOS 18.7.2, iOS 26.1 and iPadOS 26.1, macOS Sequoia 15.7.2, macOS Sonoma 14.8.2, macOS Tahoe 26.1, tvOS 26.1, visionOS 26.1, watchOS 26.1. A malicious application may be able to cause unexpected system termination or write kernel memory.

Affected products

• Apple iPadOS: before 18.7.2; 26.0 — fixed in 18.7.2
• Apple Iphone Os: before 18.7.2; 26.0 — fixed in 18.7.2
• Apple macOS: from 14.0 before 14.8.2; from 15.0 before 15.7.2; 26.0 — fixed in 14.8.2, 15.7.2
• Apple tvOS: before 26.1 — fixed in 26.1
• Apple visionOS: before 26.1 — fixed in 26.1
• Apple watchOS: before 26.1 — fixed in 26.1

How to fix

Upgrade to a fixed version: Apple iPadOS 18.7.2; Apple Iphone Os 18.7.2; Apple macOS 14.8.2, 15.7.2; Apple tvOS 26.1; Apple visionOS 26.1; Apple watchOS 26.1. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/125632
• https://support.apple.com/en-us/125633
• https://support.apple.com/en-us/125634
• https://support.apple.com/en-us/125635
• https://support.apple.com/en-us/125636
• https://support.apple.com/en-us/125637
• https://support.apple.com/en-us/125638
• https://support.apple.com/en-us/125639
• https://cloud.google.com/blog/topics/threat-intelligence/darksword-ios-exploit-chain/
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-43520

Get alerted when CVE-2025-43520 or the next vulnerability affects your stack