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CVE-2025-43529

Apple Multiple Products Use-After-Free WebKit

8.8 HIGHActively exploited (CISA KEV)EPSS 8.76%
  1. Published17 Dec 2025
  2. Added to CISA KEV15 Dec 2025
  3. Remediation due5 Jan 2026
Actively exploited (CISA KEV)

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.

Added to KEV: 15 Dec 2025Federal remediation due: 5 Jan 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

Apple Safari< 26.2
Apple iPadOS≥ 26.0 < 26.2 · < 18.7.3
Apple iPhone OS≥ 26.0 < 26.2 · < 18.7.3
Apple macOS≥ 26.0 < 26.2
Apple Tvos< 26.2
Apple Visionos< 26.2
Apple Watchos< 26.2

Remediation

Fixed in
Apple Safari≥ 26.2
Apple iPadOS≥ 26.2
Apple iPhone OS≥ 26.2
Apple macOS≥ 26.2
Apple Tvos≥ 26.2
Apple Visionos≥ 26.2
Apple Watchos≥ 26.2

References

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Frequently asked

Is CVE-2025-43529 being actively exploited?

Yes. CVE-2025-43529 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 15 Dec 2025.

How severe is CVE-2025-43529?

CVE-2025-43529 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 8.76% probability of exploitation.

Which products are affected by CVE-2025-43529?

Affected products include Apple Safari, Apple iPadOS, Apple iPhone OS, Apple macOS, Apple Tvos, and 2 more.

How do I fix CVE-2025-43529?

Upgrade affected software to a fixed version, for example Apple Safari 26.2, Apple iPadOS 26.2, Apple iPhone OS 26.2 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-43529 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, a risk for it never ranks below high, and the update that fixes it moves to the Emergency patch lane. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.