CVE-2025-43520

Apple Multiple Products Classic Buffer Overflow Vulnerability

Medium 5.5
Exploited: added to CISA KEV 20 Mar 2026

Description

A memory corruption issue was addressed with improved memory handling. This issue is fixed in iOS 18.7.2 and iPadOS 18.7.2, iOS 26.1 and iPadOS 26.1, macOS Sequoia 15.7.2, macOS Sonoma 14.8.2, macOS Tahoe 26.1, tvOS 26.1, visionOS 26.1, watchOS 26.1. A malicious application may be able to cause unexpected system termination or write kernel memory.

Key facts

Published: 12 Dec 2025
Last changed: 21 Sep 2026
Assigned by: apple
KEV added: 20 Mar 2026
KEV fix due: 3 Apr 2026
EPSS: 0.441% likely to be exploited in the next 30 days, higher than 38.88% of CVEs (scores for 15 Nov 2026)
SSVC (CISA): Exploitation: active; Automatable: no; Technical impact: total

Severity scores

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

5.5CVSS 3.1, Mediumfrom CISA (ADP container)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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 18.7.2 (affected) 0 up to but excluding 26.1 (affected)
Apple	macOS	0 up to but excluding 14.8.2 (affected) 0 up to but excluding 15.7.2 (affected) 0 up to but excluding 26.1 (affected)
Apple	tvOS	0 up to but excluding 26.1 (affected)
Apple	visionOS	0 up to but excluding 26.1 (affected)
Apple	watchOS	0 up to but excluding 26.1 (affected)