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CVE-2025-43529: Apple Multiple Products Use-After-Free WebKit Vulnerability

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2025-12-15
• EPSS: 25.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-17 · updated 2026-10-07
• Weakness: CWE-416

Description

A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.2, iOS 18.7.3 and iPadOS 18.7.3, iOS 26.2 and iPadOS 26.2, macOS Tahoe 26.2, tvOS 26.2, visionOS 26.2, watchOS 26.2. Processing maliciously crafted web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals on versions of iOS before iOS 26. CVE-2025-14174 was also issued in response to this report.

Affected products

• Apple iPadOS: before 18.7.3; from 26.0 before 26.2 — fixed in 18.7.3, 26.2
• Apple Iphone Os: before 18.7.3; from 26.0 before 26.2 — fixed in 18.7.3, 26.2
• Apple macOS: from 26.0 before 26.2 — fixed in 26.2
• Apple Safari: before 26.2 — fixed in 26.2
• Apple tvOS: before 26.2 — fixed in 26.2
• Apple visionOS: before 26.2 — fixed in 26.2
• Apple watchOS: before 26.2 — fixed in 26.2

How to fix

Upgrade to a fixed version: Apple iPadOS 18.7.3, 26.2; Apple Iphone Os 18.7.3, 26.2; Apple macOS 26.2; Apple Safari 26.2; Apple tvOS 26.2; Apple visionOS 26.2; Apple watchOS 26.2. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/125884
• https://support.apple.com/en-us/125885
• https://support.apple.com/en-us/125886
• https://support.apple.com/en-us/125889
• https://support.apple.com/en-us/125890
• https://support.apple.com/en-us/125891
• https://support.apple.com/en-us/125892
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-43529

Get alerted when CVE-2025-43529 or the next vulnerability affects your stack