CVEvulnerability

CVE-2025-43520

5.5 MEDIUM Known exploited Published 2025-12-12 Modified 2026-10-07 Official page ↗

CISA Known Exploited Vulnerability

Apple Multiple Products Classic Buffer Overflow Vulnerability — Apple Multiple Products

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.

Added to KEV: 2026-03-20
Remediation due: 2026-04-03
Ransomware use: Unknown
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

Status: Analyzed
Published: 2025-12-12
Last modified: 2026-10-07
Assigner: [email protected]
CVSS 3.1 ([email protected]): 5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0): 5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weaknesses: CWE-120

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.

Affected configurations

• apple ipados (< 18.7.2) • apple ipados 26.0 • apple iphone os (< 18.7.2) • apple iphone os 26.0 • apple macos (>= 14.0 < 14.8.2) • apple macos (>= 15.0 < 15.7.2) • apple macos 26.0 • apple tvos (< 26.1) • apple visionos (< 26.1) • apple watchos (< 26.1)

Weakness · CWE (1)

CWE-120 Buffer Copy without Checking Size of Input weakness

References