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CVE-2025-43529: Apple Multiple Products Use-After-Free WebKit Vulnerability

criticalknown exploitedpublic exploitCVE-2025-43529
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
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.

CSIRTS triage

vendor: Appleproduct: iOS, iPadOS, macOSMemory corruption
What
This vulnerability may lead to memory corruption when processing maliciously crafted web content.
Who is affected
Users of affected Apple products.
Urgency
Remediation is critical due to confirmed exploitation and the severity of the vulnerability.
Action
Update to the latest versions of Apple software.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2025-12-15
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2025-43529

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2025-43529coverage & exploitation statusNVD · CVE.org

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