CVE-2025-43300

Apple iOS, iPadOS, and macOS Out-of-Bounds Write Vulnerability

Critical 10.0
Exploited: added to CISA KEV 21 Aug 2025

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.

Key facts

Published: 21 Aug 2025
Last changed: 2 Apr 2026
Assigned by: apple
KEV added: 21 Aug 2025
KEV fix due: 11 Sep 2025
EPSS: 63.175% likely to be exploited in the next 30 days, higher than 99.218% of CVEs (scores for 15 Nov 2026)
SSVC (CISA): Exploitation: active; Automatable: yes; Technical impact: total

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

10.0CVSS 3.1, Criticalfrom CISA (ADP container)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

What to do

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.CISA KEV required action

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

Vendor	Product	Versions
Apple	iOS and iPadOS	0 up to but excluding 15.8.5 (affected) 0 up to but excluding 16.7.12 (affected) 0 up to but excluding 18.6.2 (affected)
Apple	iPadOS	0 up to but excluding 17.7.10 (affected)
Apple	macOS	0 up to but excluding 13.7.8 (affected) 0 up to but excluding 14.7.8 (affected) 0 up to but excluding 15.6.1 (affected)