CVE WatchOct 7, 2026

CVE-2025-43520

Apple Multiple Products Classic Buffer Overflow Vulnerability

CVSS

5.5

Medium

EPSS

0.4%

p35

KEV

YES

Mar 20, 2026

Exploit Today

0-100

Published: Dec 12, 2025 · Last modified: Oct 7, 2026 · CWE-120

EPSS · 30d

0.4%EPSS · 30 days0.4%

2026-09-172026-10-15

KEV catalog record

Product

Apple / Multiple Products

Vulnerability

Apple Multiple Products Classic Buffer Overflow Vulnerability

Added to KEV

Mar 20, 2026

Remediate by

Apr 3, 2026

Known ransomware use

Summary description

Apple watchOS, iOS, iPadOS, macOS, visionOS, and tvOS contain a classic buffer overflow vulnerability which could allow a malicious application to cause unexpected system termination or write kernel memory.

Required action

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

Notes

https://support.apple.com/en-us/125632 ; https://support.apple.com/en-us/125633 ; https://support.apple.com/en-us/125634 ; https://support.apple.com/en-us/125635 ; https://support.apple.com/en-us/125636 ; https://support.apple.com/en-us/125637 ; https://support.apple.com/en-us/125638 ; https://support.apple.com/en-us/125639 ; https://nvd.nist.gov/vuln/detail/CVE-2025-43520

Technical 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.

Official references

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