Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability (CVE-2025-43300)
Severity: critical · Patch status: unknown · Since 2025-08-21 · CVE-2025-43300
Apple iOS, iPadOS, and macOS contain an out-of-bounds write vulnerability in the Image I/O framework. CISA added CVE-2025-43300 to its Known Exploited Vulnerabilities catalog on Aug 21, 2025, 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 Sep 11, 2025 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch