Vulnerability · Published Sep 29, 2025 · Assigned by apple
CVE-2025-43400
Medium 6.3
In plain English
A medium-severity out-of-bounds write in iOS and iPadOS from Apple. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 7.0% (higher than 94% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Official description
An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 18.7.1 and iPadOS 18.7.1, iOS 26.0.1 and iPadOS 26.0.1, macOS Sequoia 15.7.1, macOS Sonoma 14.8.1, macOS Tahoe 26.0.1, tvOS 26.1, visionOS 26.0.1, watchOS 26.1. Processing a maliciously crafted font may lead to unexpected app termination or corrupt process memory.
Affected products (as reported)
Weakness: CWE-787 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
References
- https://support.apple.com/en-us/125326
- https://support.apple.com/en-us/125327
- https://support.apple.com/en-us/125328
- https://support.apple.com/en-us/125329
- https://support.apple.com/en-us/125330
- https://support.apple.com/en-us/125338
- https://support.apple.com/en-us/125637
- https://support.apple.com/en-us/125639
- http://seclists.org/fulldisclosure/2025/Sep/78
- http://seclists.org/fulldisclosure/2025/Sep/73
- http://seclists.org/fulldisclosure/2025/Sep/76