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

CISA Known Exploited Vulnerabilities

Name

Apple Multiple Products Use-After-Free WebKit Vulnerability

Vendor

Apple

Product

Multiple Products

Added to the catalog

2025-12-15

Due date for US federal agencies

2026-01-05

Weaknesses

CWE-416

Catalog version

2026.10.30

Apple iOS, iPadOS, macOS, and other Apple products contain a use-after-free vulnerability in WebKit. Processing maliciously crafted web content may lead to memory corruption. This vulnerability could impact HTML parsers that use WebKit, including but not limited to Apple Safari and non-Apple products which rely on WebKit for HTML processing.

Required action (CISA)

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Ransomware use: CISA does not mark known use of this vulnerability in ransomware campaigns.

Links in CISA's notes

• https://support.apple.com/en-us/125884
• https://support.apple.com/en-us/125892
• https://support.apple.com/en-us/125885
• https://support.apple.com/en-us/125886
• https://support.apple.com/en-us/125889
• https://nvd.nist.gov/vuln/detail/CVE-2025-43529

Read on 2026-11-02T23:39:54.475Z under licence cisa-kev-cc0@b0067899 from https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

NVD analysis

Status

Analyzed

Published

2025-12-17T21:16:11.570

Last modified

2026-10-07T11:10:00.153

Weaknesses

CWE-416

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.

References

• https://support.apple.com/en-us/125884 (Release Notes, Vendor Advisory)
• https://support.apple.com/en-us/125885 (Release Notes, Vendor Advisory)
• https://support.apple.com/en-us/125886 (Release Notes, Vendor Advisory)
• https://support.apple.com/en-us/125889 (Release Notes, Vendor Advisory)
• https://support.apple.com/en-us/125890 (Release Notes, Vendor Advisory)
• https://support.apple.com/en-us/125891 (Release Notes, Vendor Advisory)
• https://support.apple.com/en-us/125892 (Release Notes, Vendor Advisory)
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-43529 (US Government Resource)

This product uses the NVD API but is not endorsed or certified by the NVD.

Read on 2026-11-02T23:42:22.836Z under licence nvd-api-terms-of-use@ff2a5288 from https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2025-43529

CVE record

Assigner

apple

State

PUBLISHED

Published

2025-12-17T20:46:55.691Z

Updated

2026-09-21T16:46:54.698Z

Problem types

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.

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.

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

Read on 2026-11-03T02:16:39.492Z under licence cve-terms-of-use@81bfa2f3 from https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2025/43xxx/CVE-2025-43529.json

Defensive techniques (MITRE D3FEND)

D3FEND maps these defensive techniques to the weakness (CWE) that NVD lists for this CVE, through the digital artifacts the weakness affects. D3FEND does not say they stop this vulnerability.

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