Known exploited vulnerability
CVE-2025-43529
The short answer
CVE-2025-43529 affects Apple Safari and is rated high (CVSS 8.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2025-12-15: attackers are using it, so patch it first.
What it is
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.
Weakness: CWE-416.
Severity
8.8 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Exploited (CISA KEV)
Yes, since Dec 15, 2025
Federal due date Jan 5, 2026
EPSS, next 30 days
26%
Higher than 98% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
What CISA says to do
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Affected products
Safari, iOS and iPadOS, macOS, tvOS, visionOS, watchOS. NVD's record lists the exact affected versions.
References
- support.apple.com/en-us/125884 Release NotesVendor Advisory
- support.apple.com/en-us/125885 Release NotesVendor Advisory
- support.apple.com/en-us/125886 Release NotesVendor Advisory
- support.apple.com/en-us/125889 Release NotesVendor Advisory
- support.apple.com/en-us/125890 Release NotesVendor Advisory
- support.apple.com/en-us/125891 Release NotesVendor Advisory
- support.apple.com/en-us/125892 Release NotesVendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-43529 US Government Resource
Questions
Is CVE-2025-43529 being exploited?
Yes. CISA added CVE-2025-43529 to its Known Exploited Vulnerabilities catalog on 2025-12-15, with a federal remediation due date of 2026-01-05.
How do I fix CVE-2025-43529?
CISA's 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.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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