Detections
Analytics

CVE-2025-43400

medium

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.

References

https://securityaffairs.com/182835/security/apple-urges-users-to-update-iphone-and-mac-to-patch-font-bug.html

https://www.securityweek.com/apple-updates-ios-and-macos-to-prevent-malicious-font-attacks/

https://isc.sans.edu/diary/rss/32330

https://support.apple.com/en-us/125639

https://support.apple.com/en-us/125637

https://support.apple.com/en-us/125338

https://support.apple.com/en-us/125330

https://support.apple.com/en-us/125329

https://support.apple.com/en-us/125328

https://support.apple.com/en-us/125327

https://support.apple.com/en-us/125326

http://seclists.org/fulldisclosure/2025/Sep/78

http://seclists.org/fulldisclosure/2025/Sep/76

http://seclists.org/fulldisclosure/2025/Sep/73

Details

Source: Mitre, NVD

Published: 2025-09-29

Updated: 2026-04-02

Risk Information

CVSS v2

Base Score: 7.5

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Severity: High

CVSS v3

Base Score: 6.3

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

Severity: Medium

EPSS

EPSS: 0.0004