CVE-2025-43529
CVE-2025-43529 is a high-severity vulnerability in Apple Safari with a CVSS 3.x base score of 8.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2025-12-15). The underlying weakness is classified as CWE-416.
Key facts
- Severity: High (CVSS 3.x base score 8.8)
- EPSS exploit prediction: 8% (94th percentile)
- Actively exploited: Yes — listed in CISA KEV (added 2025-12-15)
- EU (EUVD) id: EUVD-2025-203963
- EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2025-12-15)
- Weakness: CWE-416
- Affected product: Apple Safari
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2025-43529?
- 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.
- How severe is CVE-2025-43529?
- CVE-2025-43529 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2025-43529 being actively exploited?
- Yes. CVE-2025-43529 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-12-15, which means active exploitation has been confirmed. It should be prioritised for remediation.
- What products are affected by CVE-2025-43529?
- CVE-2025-43529 primarily affects Apple Safari. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2025-43529?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
- Does CVE-2025-43529 have an EU (EUVD) identifier?
- Yes. CVE-2025-43529 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-203963. It is also flagged as exploited in the EUVD (since 2025-12-15).
- When was CVE-2025-43529 published?
- CVE-2025-43529 was published on 2025-12-17 and last updated on 2026-06-17.
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
Affected products (7)
- cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
- cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
- cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
- cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
- cpe:2.3:o:apple:tvos:*:*:*:*:*:*:*:*
- cpe:2.3:o:apple:visionos:*:*:*:*:*:*:*:*
- cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*
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Other CWE-416 (Use After Free) vulnerabilities
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