CVE-2025-43529

criticalknown exploitedpublic exploitcovered by 1 sourcefirst seen 2025-12-15

Actively exploited. CVE-2025-43529 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2025-12-15) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.

Public exploit code is available. Proof-of-concept or working exploit code for CVE-2025-43529 is indexed in GitHub PoC. Expect opportunistic scanning and exploitation attempts — prioritize remediation.

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

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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Exploitation outlook

Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 94% of all EPSS-scored CVEs.

Exploit availability

Public exploit or proof-of-concept code for CVE-2025-43529 is indexed in these free datasets. Available exploit code raises real-world risk independent of the CVSS score.

GitHub PoCPublic proof-of-concept repositories on GitHub reference this CVE.look it up ↗

Advisory coverage (1)

criticalexploitedCVE-2025-43529: Apple Multiple Products Use-After-Free WebKit Vulnerabilitycisa-kev · 2025-12-15

External references

NVD record for CVE-2025-43529

CVE.org record

CISA KEV catalog

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