CVE-2025-43240

Severity: medium (CVSS 6.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-07-30 · updated 2026-06-17
Weakness: CWE-703

Description

A logic issue was addressed with improved checks. This issue is fixed in Safari 18.6, macOS Sequoia 15.6. A download's origin may be incorrectly associated.

Affected products

Apple macOS: before 15.6 — fixed in 15.6
Apple Safari: before 18.6 — fixed in 18.6

How to fix

Upgrade to a fixed version: Apple macOS 15.6; Apple Safari 18.6. Check the vendor advisory for mitigations.

References

https://support.apple.com/en-us/124149
https://support.apple.com/en-us/124152
http://seclists.org/fulldisclosure/2025/Aug/0
http://seclists.org/fulldisclosure/2025/Jul/32
http://www.openwall.com/lists/oss-security/2025/08/02/1
https://lists.debian.org/debian-lts-announce/2025/08/msg00015.html

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