Is CVE-2025-43529 actively exploited?

Yes. CVE-2025-43529 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2025-43529 be exploited remotely?

Yes. CVE-2025-43529 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2025-43529?

CVE-2025-43529 has a CVSS score of 8.8 (HIGH) and an EPSS exploitation probability of 0.03%.

HOME VULNERABILITIESCVE-2025-43529

HIGHCISA KEVIN THE WILD

CVE-2025-43529

Published: December 15, 2025

8.8

CVSS v3.1

EPSS:0.03%probability of exploitation in 30 daysPercentile:6.8th

Official Description

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.

NVD Source

CISA KEV Advisory

Apple Multiple Products Use-After-Free WebKit Vulnerability

Added to KEV: 2025-12-15Federal patch deadline: 2026-01-05

Required Action (CISA)

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

Risk Analysis

This use-after-free vulnerability in Apple WebKit, affecting iOS, iPadOS, macOS, and other Apple products, can lead to memory corruption when processing malicious web content. With a high CVSS score of 8.8 and confirmed active exploitation in CISA's KEV catalog, this is a critical vulnerability requiring immediate attention. The low EPSS score does not diminish the urgency of this confirmed threat.

This vulnerability is actively being exploited in the wild and is listed in CISA's KEV catalog. It is remotely exploitable by processing maliciously crafted web content.

Recommended Action

Apply the latest security updates for Apple iOS, iPadOS, macOS, and any other affected Apple products. Ensure all WebKit-dependent applications are updated to their most secure versions.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2025-43529 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.

CISA has added CVE-2025-43529 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.