CVEs / CVE-2025-43529
CVE-2025-43529: Apple Multiple Products Use-After-Free WebKit Vulnerability
- Known exploited in the CISA KEV catalog since 15 Dec 2025
- high 8.8 CVSS 3.1 (from the CNA)
- EPSS 25.6% chance of exploitation in the next 30 days, higher than 97% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
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.
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 and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| Apple Safari | before 26.2 | 26.2 |
| Apple iOS and iPadOS | before 18.7.3 | 18.7.3 |
| Apple iOS and iPadOS | before 26.2 | 26.2 |
| Apple macOS | before 26.2 | 26.2 |
| Apple tvOS | before 26.2 | 26.2 |
| Apple visionOS | before 26.2 | 26.2 |
| Apple watchOS | before 26.2 | 26.2 |
Exploitation
| In CISA KEV since | 15 Dec 2025 |
|---|---|
| Due date for US federal agencies | 5 Jan 2026 |
| Used in ransomware campaigns | Unknown |
| Required action | Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. |
Severity
| CVSS 3.1 | 8.8 highCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HScored by the CNA (134c704f-9b21-4f2e-91b3-4a467353bcc0) |
|---|---|
| Weakness | CWE-416 |
References
- CVE-2025-43529 on NVD
- CVE-2025-43529 in the CISA KEV catalog
- https://support.apple.com/en-us/125884 (cited by CISA)
- https://support.apple.com/en-us/125892 (cited by CISA)
- https://support.apple.com/en-us/125885 (cited by CISA)
- https://support.apple.com/en-us/125886 (cited by CISA)
- https://support.apple.com/en-us/125889 (cited by CISA)
- CVE-2025-43529 on OSV
- 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
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.