Apple Multiple Products Classic Buffer Overflow Vulnerability (CVE-2025-43520)
Severity: medium · Patch status: unknown · Since 2026-03-20 · CVE-2025-43520
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 added CVE-2025-43520 to its Known Exploited Vulnerabilities catalog on Mar 20, 2026, which means attackers are exploiting it in the wild.
What to do
- Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- US federal agencies must remediate by Apr 3, 2026 (BOD 22-01); treat that as the outer limit.
Sources
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