CVE-2025-43520
Actively exploited. CVE-2025-43520 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-03-20) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
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.
CSIRTS triage
- What
- Apple products contain a classic buffer overflow vulnerability which could allow a malicious application to cause unexpected system termination or write kernel memory.
- Who is affected
- Users of Apple watchOS, iOS, iPadOS, macOS, visionOS, and tvOS.
- Urgency
- Remediation is urgent due to active exploitation and critical severity.
- Action
- Update to the latest versions of affected Apple products.
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 32% of all EPSS-scored CVEs.
Advisory coverage (1)
- criticalexploitedCVE-2025-43520: Apple Multiple Products Classic Buffer Overflow Vulnerabilitycisa-kev · 2026-03-20
External references
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