CVE-2025-43529highunder attackCWE-416

CVE-2025-43529: high-severity vulnerability in Apple Safari

Published · Updated

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81Vexday Risk Score

Prioritize patching. It under exploitation confirmed by CISA and has a public proof of concept.

ssvc Actcvss 8.8epss 26%
from disclosure to weapon19 days
Published on NVDDec 17
1st PoC+19d
CISA KEVDec 15
victimsOct 27
Appeared in 1 incident(s) we investigated
What the vendors declare (VEX)

Official vendor statements in CSAF/VEX format: whether their product is affected, already fixed, or ruled out — and why. These are the vendor's assertions, not Vexday's judgment.

Affected
2 products (10 components)
Red Hat Enterprise Linux 6 · Red Hat Enterprise Linux 7
workaround: To mitigate this issue, avoid processing untrusted web content. Additionally, disabling the JavaScript JIT compiler can reduce the attack surface…
Fixed
16 products (482 components)
Red Hat Enterprise Linux AppStream (v. 8) · Red Hat Enterprise Linux AppStream (v. 9) · Red Hat Enterprise Linux AppStream E4S (v.8.6) · Red Hat Enterprise Linux AppStream E4S (v.9.0) · Red Hat Enterprise Linux AppStream E4S (v.9.2) · and others 11
Action required by CISAfederal deadline: 2026-01-05

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

In short

A memory management flaw in Safari and Apple operating systems allows attackers to execute arbitrary code by processing malicious web content. This vulnerability has been actively exploited in targeted attacks against specific individuals.

Technical detail

Use-after-free vulnerability (CWE-416) in WebKit rendering engine affects Safari and multiple Apple OS platforms. Attack vector is network-based through maliciously crafted web content; no user authentication required beyond visiting a compromised webpage. Successful exploitation grants arbitrary code execution in the context of the affected application, with evidence of real-world exploitation in sophisticated targeted campaigns.

Summary generated and translated by AI from the official description.

The full analysis of this CVE is available in Portuguese →

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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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