Exploited vulnerabilities / CVE-2025-43520
Confirmed exploited · memory corruption · Apple Multiple ProductsCVE-2025-43520
Apple Multiple Products memory corruption, confirmed exploited in the wild.
Apple watchOS, iOS, iPadOS, macOS, visionOS, and tvOS contain a classic buffer overflow vulnerability which could allow a malicious application to cause unexpected system termination or write kernel memory.
| CISA's name for it | Apple Multiple Products Classic Buffer Overflow Vulnerability |
|---|---|
| Vendor and product | Apple · Multiple Products |
| Type | memory corruption · CWE-120 |
| Exploited | Confirmed by CISA listed 20 March 2026 |
| Likelihood | scored lower by EPSS, but already confirmed exploited, which outranks any prediction |
| Deadline | 3 April 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-2025-43520 in short
Is CVE-2025-43520 being exploited?
Yes. CISA added CVE-2025-43520 to its Known Exploited Vulnerabilities catalogue on 20 March 2026, which it does only on evidence of exploitation in the wild.
What is the CISA deadline for CVE-2025-43520?
US federal agencies must remediate it by 3 April 2026. Everyone else should treat that date as the latest safe point to patch an internet-facing system.
How likely is CVE-2025-43520 to be exploited in the next 30 days?
FIRST's Exploit Prediction Scoring System gives it 0.4%, the 38th percentile of every CVE it scores.
How do I fix CVE-2025-43520?
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-2025-31277 | Multiple Products | memory corruption | 20 March 2026 |
| CVE-2023-43000 | Multiple Products | memory corruption | 5 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.