Exploited vulnerability · CISA KEV
Yes. CVE-2025-43300, Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 21 Aug 2025, the day it was published. It affects Apple iOS, iPadOS, and macOS. If you run it, CISA's required action is: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Apple iOS, iPadOS, and macOS contain an out-of-bounds write vulnerability in the Image I/O framework.
| Vendor | Apple (96 exploited CVEs in KEV) |
| Product | iOS, iPadOS, and macOS |
| Vulnerability | Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability |
| Weakness | CWE-787 |
| Published | 21 Aug 2025 |
| Added to KEV | 21 Aug 2025 |
| Reported by (CNA) | apple |
Yes. CISA added CVE-2025-43300 to the Known Exploited Vulnerabilities catalog on 21 Aug 2025, which means there is reliable evidence of exploitation in the wild.
CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Check Apple's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected iOS, iPadOS, and macOS and watch it for signs of compromise.
Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in August 2025 · Apple scorecard · act-now radar.
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