CVE-2025-43400mediumCWE-787

CVE-2025-43400: medium-severity vulnerability in Apple macOS

Published 29 Sep 2025 · Updated 02 Apr 2026

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13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 6.3epss 7.0%

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.

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

Affected products

Apple · iOS and iPadOS Apple · macOS Apple · tvOS Apple · visionOS Apple · watchOS

Related CVEs — Apple macOS

In the same product, most dangerous first.

CVE-2021-30860HIGHCVE-2021-30860EPSS 76.0%KEV CVE-2021-30657MEDIUMCVE-2021-30657EPSS 68.5%KEV CVE-2025-43300CRITICALCVE-2025-43300EPSS 65.2%KEV CVE-2023-41064HIGHCVE-2023-41064EPSS 53.4%KEV CVE-2023-32434HIGHCVE-2023-32434EPSS 51.5%KEV CVE-2021-30807HIGHCVE-2021-30807EPSS 28.8%KEV

References

http://seclists.org/fulldisclosure/2025/Sep/73 http://seclists.org/fulldisclosure/2025/Sep/76 http://seclists.org/fulldisclosure/2025/Sep/78 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