CVE-2025-43300
Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability
This vulnerability is in the CISA Known Exploited Vulnerabilities catalog: attackers are using it. If you run iOS, iPadOS, and macOS, fix it now.
CISA required action: 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 civilian agencies must remediate by Sep 11, 2025.
Patch status
No official fix confirmed yet
Until a fix ships, follow the vendor's mitigations and CISA's required action, limit exposure of affected systems, and watch this record for a patch.
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.
Source: NIST National Vulnerability Database. Official vulnerability data, reproduced as published.
Affected products
| Product | Vendor | Affected versions | Fixed in | Source |
|---|---|---|---|---|
| iOS & iPadOS | Apple | < 15.8.5; >= 16.0, < 16.7.12; >= 17.0, < 17.7.10; >= 18.0, < 18.6.2 | 15.8.5; 16.7.12; 17.7.10; 18.6.2 | NVD |
| iOS, iPadOS, and macOS | Apple | — | — | KEV |
| macOS | Apple | >= 13.0, < 13.7.8; >= 14.0, < 14.7.8; >= 15.0, < 15.6.1 | 13.7.8; 14.7.8; 15.6.1 | NVD |
Sources: NVD = NIST National Vulnerability Database; KEV = CISA Known Exploited Vulnerabilities catalog.
Intelligence timeline
Developments from the last 30 days, newest first.
- CVSS scoredUpdateKEV
CVE-2025-43300 scored CVSS 10.0: Apple iOS, iPadOS, and macOS, Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability
CISA lists this as exploited in the wild. Unpatched iOS, iPadOS, and macOS systems are exposed to active attacks now.
Basis: NIST National Vulnerability Database
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Coverage
We have not published a story about this vulnerability yet.