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[ CVE-2025-43300 · Published 21 Aug 2025 ]

Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability

Exploited · CISA KEV CVSS 10.0 EPSS 32%No fix listed yet

[ Why it matters ]Priority signals

  • Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2025-08-21
  • EPSS: 32% chance of exploitation in the next 30 days (higher than 98% of CVEs)
  • Critical severity: CVSS 10.0

[ Description ]Official description

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 15.8.5 and iPadOS 15.8.5, iOS 16.7.12 and iPadOS 16.7.12, iOS 18.6.2 and iPadOS 18.6.2, iPadOS 17.7.10, macOS Sequoia 15.6.1, macOS Sonoma 14.7.8, macOS Ventura 13.7.8. Processing a malicious image file may result in memory corruption. Apple is aware of a report that this issue may have been exploited in an extremely sophisticated attack against specific targeted individuals.

CISA: Apple iOS, iPadOS, and macOS contain an out-of-bounds write vulnerability in the Image I/O framework.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 11 Sep 2025): Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References