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CVE-2025-43520: Apple Multiple Products Classic Buffer Overflow Vulnerability

criticalknown exploitedCVE-2025-43520
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 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

vendor: AppleOther
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.

Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2026-03-20
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2025-43520

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-2025-43520coverage & exploitation statusNVD · CVE.org

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