Exploited vulnerabilities / CVE-2025-43529
Confirmed exploited · memory corruption · Apple Multiple ProductsCVE-2025-43529
Apple Multiple Products memory corruption, confirmed exploited in the wild.
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.
| CISA's name for it | Apple Multiple Products Use-After-Free WebKit Vulnerability |
|---|---|
| Vendor and product | Apple · Multiple Products |
| Type | memory corruption · CWE-416 |
| Exploited | Confirmed by CISA listed 15 December 2025 |
| Likelihood | one of the most likely to be exploited of every vulnerability tracked |
| Deadline | 5 January 2026 · already passed |
| Used in ransomware | Not reported |
| Advisories | support.apple.com ↗ · support.apple.com ↗ · support.apple.com ↗ · support.apple.com ↗ |
Three steps, in this order
Update the product (and every browser or app that embeds it) to the fixed version.
Make sure automatic updates are on and actually applied; restart where the update needs it.
Watch endpoints for crashes and unusual child processes from the affected software.
| CISA's required action | Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. |
|---|
Know before someone else finds it
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CVE-2025-43529 in short
Is CVE-2025-43529 being exploited?
Yes. CISA added CVE-2025-43529 to its Known Exploited Vulnerabilities catalogue on 15 December 2025, which it does only on evidence of exploitation in the wild.
What is the CISA deadline for CVE-2025-43529?
US federal agencies must remediate it by 5 January 2026. Everyone else should treat that date as the latest safe point to patch an internet-facing system.
How likely is CVE-2025-43529 to be exploited in the next 30 days?
FIRST's Exploit Prediction Scoring System gives it 26%, the 97th percentile of every CVE it scores.
How do I fix CVE-2025-43529?
Update the product (and every browser or app that embeds it) to the fixed version. Make sure automatic updates are on and actually applied; restart where the update needs it. Watch endpoints for crashes and unusual child processes from the affected software.
Other Apple vulnerabilities being exploited
| CVE | Product | Type | Listed |
|---|---|---|---|
| CVE-2024-27834 | Multiple Products | authentication bypass | 4 November 2026 |
| CVE-2026-86950 | Multiple Products | remote code execution | 29 September 2026 |
| CVE-2026-65400 | macOS | authentication bypass | 18 August 2026 |
| CVE-2025-43510 | Multiple Products | exploited vulnerability | 20 March 2026 |
| CVE-2025-43520 | Multiple Products | memory corruption | 20 March 2026 |
| CVE-2025-31277 | Multiple Products | memory corruption | 20 March 2026 |
Sources: CISA Known Exploited Vulnerabilities catalogue (released 10 November 2026) and FIRST EPSS. Page compiled automatically by SAK T.L.M, the threat-intelligence tool of SAK T.E.C, on 13 November 2026.